Mud squirts. Mobilized lacustrine muds are dragged upward into an overriding sand bed deposited by a Missoula flood entering Glacial Lake Columbia. The "T-shaped mud squirts" formed as a result of soupy (saturated) lake bottom muck being disturbed by a density current. So the geologic setting is a fast-moving, sediment-laden flood entering Glacial Lake Columbia from the east. The sand is carried at the base of the flow and along the lake bottom. Mud squirt formation involves

While mapping the geology of the 1:24,000 scale Georgetown Quad near Bennington, ID, structural geologist Jim Coogan discovered linear anomalies in aerial photos. Jim showed Dennis and I these when we were all working in the area together and I've done a bit more snooping around in Google Earth since then. The linear elements are best seen in harvested hay fields. They are durable features that persist in photo sets from 2013, 2014, and 2016. Earlier photos are of insufficien