Grooved boulder
Part of Hall of Planet Earth.
All admission to the Museum is by timed-entry, and must be reserved online.
Part of Hall of Planet Earth.
Poke-O-Moonshine Mountain, Adirondacks, New York
Rocks and pebbles embedded in the underside of flowing glaciers created the grooves, called glacial striations, on the surface of this granite gneiss. Glacial striations show the direction the ice flowed.
AMNH Collections