YellowstoneNPS:
YELL-94359 Fossilized cone
YellowstoneNPS:
YELL-94341 Fossilized seed fern
YellowstoneNPS:
YELL_92942 Fossil Macginitiea wyominensis
YellowstoneNPS:
YELL_92933 Petrified wood
YellowstoneNPS:
YELL_11626 Fossil fern leaf
YellowstoneNPS:
YELL_2323 Fossil angiosperm leaf
YellowstoneNPS:
Petrified Tree
YellowstoneNPS:
USNM_35225 Trilobite hash beds
YellowstoneNPS:
USNM_35227 Trilobite hash beds
YellowstoneNPS:
USNM_35236 trilobite
YellowstoneNPS:
USNM_61523 Tricrepicephalus yellowstonensis trilobite
YellowstoneNPS:
USNM_90667 Ehmania walcotti trilobite
YellowstoneNPS:
USNM_96488 Blountia polita trilobite
YellowstoneNPS:
YELL_165705 Agnostid trilobite
YellowstoneNPS:
YELL_16706 Ptychopariid trilobite
YellowstoneNPS:
YELL_16715 Ptychopariid trilobite
YellowstoneNPS:
YELL-92020 Ptychopariid trilobite
YellowstoneNPS:
Trace fossil
YellowstoneNPS:
YELL_92024 Articulate brachiopods
YellowstoneNPS:
YELL_92017 Inarticulate brachiopods
YellowstoneNPS:
USNM_35218 Hyolithes gallatinensis
YellowstoneNPS:
YELL-92021 Hyolitha
YellowstoneNPS:
YELL_134174(1) Second molar of a brontothere
YellowstoneNPS:
YELL_134174(2) Second molar of a brontothere