Figure 2.
(A) A cross-polarized photomicrograph of an individual fracture from a tabular fracture cluster (TFC). Angular clasts are found within the fracture, and the matching grains on either side indicate a lack of shearing. (B) Photograph of a TFC illustrating their highly fractured nature, with abundant vertically oriented fractures separating thin (<1 cm) panels of unfractured rock. (C) Bedrock furrow that was eroded by ice flowing parallel to the TFC exposed along the furrow’s bottom. (D) The outcrop-scale geomorphic expression of TFCs oriented parallel to ice flow; at least one TFC is located along the bottom of every bedrock furrow. (E) Furrows in the bedrock slope between Budd Lake and Tuolumne Meadows, resulting from the preferential erosion of TFCs oriented parallel to ice flow.