Page 32 - i1052-5173-30-8

Available at the GSA BOOKSTORE

Field Guide 59 Field Guide 57
Special Paper 547
Y
F
G
R
E
L
T
D
O
GEOLOGY FIELD TRIPS
G G E OL O G Y F I I E L D T R I I P S
S
OL
E
P
By P .G. DeCelles et al.
Structural and Thermal Evolution of in and around the U.S. Capital l l
n
n
p
p
d a
r
r
d a
a
t
t
a
a
i
n a
n a
i
i i
a
h
S
d t
h
e U
.
.
e U
S
. C
u
o
o
u
. C
d t
n
n
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
o
o
o
o
o
o
o
o
o
o
o
o
o
o
e M
e M
e M
e M
e M
e M
e M
o
o
o
e M
e M
e M
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
h
h
e M
h
h
h
e M
e M
e M
e M
e M
e M
e M
h
h
h
h
h
h
h
h
h
h
h
h
h
h
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
e M
o
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
o
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
h
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
s t
s t
s t
s t
s t
s t
s t
s t
o t
o t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
s t
o t
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
o t
h
h
h
h
h
h
h
h
h
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
o t
u
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
a
i
i
a
a
a
i
i
i
i
i
i
i
a
a
a
a
a
a
a
a
a
a
a
a
a
a
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
i
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
i
i
i
i
i
i
i
n
n
n
i
i
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
n
u
u
u
n
n
n
n
n
n
n
u
u
u
u
u
u
u
u
u
u
u
u
u
u
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
t
t
t
t
t
t
t
t
t
t
t
t
t
t
n
n
n
n
n
n
n
t
t
t
n
n
n
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
s t
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
r
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
s
s
s
s
s
s
s
s
s
s
s
s
s
e I
r
r
e I
e I
e I
s
s
s
r
r
s
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
r
r
r
r
r
r
r
r
r
r
r
r
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
e I
h
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
o
o
o
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
r
r
r
r
r
r
r
r
o
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
o
o
o
r
o
o
r
o
o
o
o
o
o
r
r
r
o
o
r
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
m t
m t
m t
m t
m t
m t
m t
r
r
r
m t
r
r
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
h
h
h
h
h
h
h
h
h
h
h
h
h
r
r
r
r
r
r
h
h
h
r
r
r
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
h
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
m t
s
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
n
n
a
a
a
n
n
n
n
n
n
a
a
a
a
a
a
a
a
a
a
a
a
a
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
n
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
s t
d
d
d
s t
s t
s t
s t
s t
s t
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
d
d
d
d
d
d
d
d
d
d
d
d
d
n
d
d
n
n
n
d
d
d
d
d
d
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
d
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
s
s
s
s
s
s
s
s
s
s
s
s
F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F
From the Islands to the Mountains s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
r
r
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
a
a
a
a
a
a
a
a
a
a
a
a
a
l
l
l
l
l
l
l
l
l
l
l
l
l
l
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
Edited by Christopher S. Swezey and Mark W. Carter
A 2 0 2 0 V I E W O F G E O L O G I C E X C U R S I O N S I N S O U T H E R N C A L I F O R N I A Structural and Thermal Evolution of the Himalayan Thrust Belt in Midwestern Nepal GEOLOGY FIELD TRIPS IN AND AROUND THE U.S. CAPITAL
By P.G. DeCelles, B. Carrapa, T.P. Ojha, G.E. Gehrels, and D. Collins
Edited by Richard V. Heermance and Joshua J. Schwartz
GSA Special Paper 547
From the Islands to the Mountains: A 2020 View Structural and Thermal Evolution of the Geology Field Trips in and
of Geologic Excursions in Southern California Himalayan Thrust Belt in Midwestern Nepal around the U.S. Capital
Edited by Richard V. Heermance By P.G. DeCelles, B. Carrapa, T.P. Ojha, Edited by Christopher S. Swezey
and Joshua J. Schwartz G.E. Gehrels, and D. Collins and Mark W. Carter
FLD059, 195 p., ISBN 9780813700595 SPE547, 77 p. + insert, ISBN 9780813725475 FLD057, 103 p., ISBN 9780813700571
$45.00 | member price $32.00 $42.00 | member price $30.00 $29.00 | member price $20.00
Field Guide 55
Special Paper 542
i
r
r
s
s
i
G G Geologic Excursions 250 Million Years of
e
e
s
s
on
on
ic
ic
og
E
E
x
x
c
c
u
u
og
ol
ol
Special Paper 544
MASS EXTINCTIONS, VOLCANISM, AND IMPACTS:
MASS
MASS
MASS
MASS EXTINCTIONS , , , , , , , , , , , , , VOLCANISM, AND IMP A A A A A A A A A A A A A CTS: I I I I I I I I IN SOUTHWESTERN NORTH AMERICA A A A A A A A A Earth History in Central Italy
MASS
MASS
MASS
MASS
MASS
MASS
MASS
MASS
MASS
AND
AND
AND
AND
AND
AND
AND
AND
VOLCANISM,
VOLCANISM,
VOLCANISM,
VOLCANISM,
AND
VOLCANISM,
VOLCANISM,
IMP
IMP
IMP
IMP
IMP
IMP
IMP
IMP
AND
AND
AND
IMP
IMP
IMP
IMP
CTS:
CTS:
CTS:
CTS:
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
CTS:
CTS:
CTS:
CTS:
CTS:
CTS:
CTS:
CTS:
VOLCANISM,
VOLCANISM,
EXTINCTIONS
VOLCANISM,
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
EXTINCTIONS
VOLCANISM,
VOLCANISM,
VOLCANISM,
S
S
S
S
S
E
E
E
W
W
W
E
E
S
E
E
E
S
E
E
E
E
E
R
R
R
E
R
E
T
T
T
S
T
T
E
T
T
T
W
S
S
S
S
S
OU
OU
OU
OU
OU
OU
N
N
N
N
N
N
S
S
S
N
N
H
H
H
H
H
H
W
W
W
H
W
T
T
T
OU
OU
T
T
H
T
T
T
M
M
M
M
M
E
E
E
M
M
M
A
A
A
H
H
A
A
A
A
A
IC
IC
IC
R
R
IC
IC
IC
IC
IC
R
E
E
E
E
E
R
R
R
R
R
NO
NO
NO
N
NO
NO
R
NO
NO
NO
N
R
N
R
R
R
N
N
N
N
N
T
H
T
T
T
H
H
H
H
H
T
R
R
R
R
R
T
T
T
R
R
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
NEW DEVELOPMENTS
Edited by Philip A. Pearthree
Celebrating 25 Years of the Geological Observatory of Coldigioco
25 Years of the Geological Observatory of Coldigioco
250 Million Years of Earth History in Central Italy: Celebrating
Geologic Excursions in Southwestern North America
Edited by Thierry Adatte, David P.G. Bond, and Gerta Keller
Edited by Christian Koeberl and David M. Bice
Mass Extinctions, Volcanism, and Geologic Excursions in 250 Million Years of Earth History in
Impacts: New Developments Southwestern North America Central Italy: Celebrating 25 Years of the
Edited by Thierry Adatte, Edited by Philip A. Pearthree Geological Observatory of Coldigioco
David P.G. Bond, and Gerta Keller FLD055, 554 p., ISBN 9780813700557 Edited by Christian Koeberl and David M. Bice
SPE544, 245 p., ISBN 9780813725444 $80.00 | member price $56.00 SPE542, 532 p., ISBN 9780813725420
$60.00 | member price $42.00 $120.00 | member price $84.00
Field Guide 54
Special Paper 543
Special Paper 541
y and
y and
ysical Geograph
ysical Geograph
The Ph
The Ph ysical Geograph y and
The Physical Geography and
The Ph
E
A
E
E
A
A
E
ND
ND
ND
L
ND
ND
A
A
A
E
E
A
E
A
E
E
A
E
A
ICELAND
IC
IC
IC
IC
IC
IC
IC
L
IC
IC
IC
L
L
L
L
ND
ND
ND
L
L
L
ND
L
ND
ents
Geolog
Area
Geology of the Driftless Area
Circum-Arctic Structural Ev
Circum-Arctic Structural Events
y of the Driftless
Geolog y of the Driftless Area IC E L A ND Circum-Arctic Structural Ev ents
Geology of the Driftless Area
The Formation and Evolution of a Young, Dynamic, Volcanic Island— A Field Trip Guide
The Career and Contributions of James C. Knox Tectonic Evolution of the Arctic Margins and Trans-Arctic Links
with Adjacent Orogens
Circum-Arctic Structural Events:
Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens
The Physical Geography and Geology of the Driftless Area: The Career and Contributions of James C. Knox
Edited by Karsten Piepjohn, Justin V. Strauss, Lutz Reinhardt, and William C. McClelland
By B.T. Jordan, T.L. Carley, and T.J. Banik | ICELAND: The Formation and Evolution of a Young, Dynamic, Volcanic Island—A Field Trip Guide
By Brennan T. Jordan, Tamara L. Carley, and Tenley J. Banik
Edited by Eric C. Carson, J. Elmo Rawling III, J. Michael Daniels, and John W. Attig
The Physical Geography and Geology Iceland: The Formation and Evolution Circum-Arctic Structural Events:
of the Driftless Area: The Career and of a Young, Dynamic, Volcanic Tectonic Evolution of the Arctic Margins and
Contributions of James C. Knox Island— A Field Trip Guide Trans-Arctic Links with Adjacent Orogens
Edited by Eric C. Carson, J. Elmo Rawling III, By Brennan T. Jordan, Tamara L. Carley, Edited by Karsten Piepjohn, Justin V. Strauss,
J. Michael Daniels, and John W. Attig and Tenley J. Banik Lutz Reinhardt, and William C. McClelland
SPE543, 156 p., ISBN 9780813725437 FLD054, 118 p., ISBN 9780813700540 SPE541, 686 p., ISBN 9780813725413
$30.00 | member price $21.00 $40.00 | member price $28.00 $120.00 | member price $84.00
https://rock.geosociety.org/store/
toll-free 1.800.472.1988 • 1.303.357.1000, option 3
gsaservice@geosociety.org