Valentine Formation

Geology

Group: Ogallala

Members: unnamed (18), ? Devil's Gulch (1), Burge (40), Cornell Dam (9), Crookston Bridge (26), Devil's Gulch (24), lower (4)

Lithologies: not reported (61), claystone (2), sandstone (4), conglomerate (1)

Paleoenvironments: terrestrial indet. (117), fluvial indet. (1), "channel" (1), crevasse splay (1), fluvial-lacustrine indet. (2)

Age range: base of the Barstovian to the top of the Clarendonian or 16.30000 to 9.40000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Barstovian16.3 - 12.5USA (Nebraska) (18026 18027 18031 18051 18052 18058 18062 18067 18068 18090 18101 18109 18119 18120 18123 18124 18125 18131 18132 18133 18141 18144 18153 18154 18155 18162 18163 18165 18167 18172 18173 18199 18205 18216 18223 18232 18265 18266 18272 18275 18281 18284 18285 18286 18287 18292 18332 18337 18345 18357 18361 18363 18376 18399 18402 18411 18412 18416 18417 18435 18442 18443 18464 18498 22649 74097 210952 210954)
Barstovian16.3 - 12.5USA (South Dakota) (105967)
Barstovian - Clarendonian16.3 - 9.4USA (Nebraska) (18070 18077 18112 18150 18235 18238 18270 18280 18306 18422 23401)
Clarendonian12.5 - 9.4USA (Nebraska) (18056 18075 18078 18079 18082 18106 18147 18148 18152 18156 18157 18159 18176 18177 18212 18217 18230 18242 18243 18255 18260 18267 18314 18315 18316 18317 18331 18334 18362 18372 18408 18413 18414 18418 18427 18434 18452 18465 18466 93076 109308)
Clarendonian12.5 - 9.4USA (South Dakota) (18428)