In 1950, the Rochester Museum of Arts and Sciences donated several modified bone and antler artifacts from the Lamoka Lake Site to the Smithsonian Institution. One of them was the artifact above (Accession No. A397991), made from a white-tailed deer or possibly elk (wapiti) antler.
William Ritchie, in his 1932 report, considered this and other artifacts like it as possible pendants, amulets, or tally sticks. They may also have had a more practical use. Some antler artifacts from the site were also decorated with red ochre stripes. To my knowledge, these artifacts have not been studied by anyone else since the original analysis by Ritchie in the 1920s.
Spray paint and bullets were used to deface Hidden Cave, a major archaeological site on BLM land in Nevada. A $1,000 reward is being offered, and public tours of the site have been suspended while officials investigate. According to the official press release, this is the first incidence of vandalism at the site.
Hidden Cave was most extensively excavated by David Hurst Thomas and the American Museum of Natural History and provided valuable information on Late Archaic hunter-gatherers. The Museum has a nice post on the history of the cave, (conditions in the cave during excavation sound horrid) and they also make the full site report freely available.
There’s a Lamoka connection, too: Mark R. Harrington, the first archaeologist to explore Hidden Cave, was married to the sister of Arthur Parker, head of the Rochester Museum while Lamoka Lake was being excavated in the 1920s.