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IN ELLIGEN ESOU ES IN . offers Seismic Refraction &
Borehole Tomography software : velocity structure imaging for civil engineering and exploration

Intelligent Resources Inc.
142-757 West Hastings Street
Vancouver BC V6C 1A1
Canada

Phone +1 604 782-9845
Fax +1 604 408-8678
Web http://rayfract.com
E-mail info@rayfract.com

500 full licenses sold.

Our traveltime tomography software models seismic refraction, transmission and diffraction with Fresnel volumes
instead of rays. Import or pick first breaks and run Steepest-Descent or Conjugate-Gradient inversion. Flexible
smoothing with our new Wavelength-Dependent Velocity Smoothing. Multiscale tomography. Supports strong
topography, local velocity inversions. Uses multiple CPU cores. Joint inversion of refraction/crosshole/uphole/VSP
shots. Circular receiver spreads. Specify velocity constraints. Build synthetic models with Surfer , forward model
®
traveltimes. Convert Plus-Minus, Wavefront, CMP refractors to layered starting model or use 1D-gradient starting
model. Import SEGY and SEG-2 trace files. Flexible trace display, frequency filtering, shot stacking. Reads third-party
ASCII file formats. Standard license is US $ 2,200.00 including one year of support. 20% academic discount. Latest
release notes and help file, free trial, tutorials, published benchmark comparisons, dongle drivers on our website.

Copyright © 1996-2022 Intelligent Resources Inc. RAYFRACT is a registered trademark of Intelligent Resources Inc. in Canada and
Switzerland. Canadian Business No. 86680 1236. Requires Golden Software’s Surfer for plotting.

Take a Walk in

the Park and Talk

about Geology

Whether you’re a native New Yorker or planning a trip
to NYC this summer, you’ll want to make time for this
excursion through Central Park.
From the Harlem Meer to the Rock of No Hope, eight field
stops take you around northern Central Park to give you
an overview of the geology of the Manhattan Prong. This
guide provides background and the regional geologic Store at https://rock.geosociety.org/Store/ and search
context, as well as descriptions of the rocks in this region. “CentralParkRock” to download your copy and gain a new
New geochemical and isotopic perspective of this iconic urban park.
results are also presented. While exploring the park and cultivating your newfound
appreciation for Central Park rock formations, please refrain
To help get you started, we’re
offering free digital access from collecting any samples without prior authorization and
to this field trip now through the requisite permits.
the end of July. Visit the GSA The exploration begins at www.gsapubs.org.

Photos from S.J. Jaret et al., 2021, Geology of Central Park, Manhattan, New York City, USA, in Florsheim, J.,
et al., eds., Field Excursions from the 2021 GSA Section Meetings: GSA Field Guide 61, https://doi.org/10.1130/
2020.0061(02).

www.geosociety.org/gsatoday 39