Grooved boulder
Part of Hall of Planet Earth.
Facial coverings and timed-entry ticket reservations continue to be required for Museum entry. See Health and Safety.
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