During my visit to the Gallery of Natural History at the Arizona Historical Society Museum at Papago Park (1300 N. College Ave, Tempe Arizona 85281) I saw fossil specimen (AHS-NH#14891) from Yavapai County, Arizona USA. It is a polished palm tree fossil.
Image taken October 2014.
Learn more:
http://waynesword.palomar.edu/trjune99.htm#palmwood
