Granite needle - Black Hills, South Dakota 108 /repositories/4/archival_objects/598315 1 item 1920-1922 37 Scope and Contents

Granite needle in the South Dakota Black Hills. Photocopy of original envelope reads: " 529. Granite needle [lost text] the new Needle's Eye Tunnel [near] Sylvan Lake, South Dakota." One of three Princeton student geological and paleontological expeditions to the Badlands led by Professor William J. Sinclair between 1920-1922. Title constructed by cataloger.