Bridger Formation

Geology

Members: unnamed (207), Black Fork (1), Black's Fork (9), Blacks Fork (29), Cedar Mountain ("Bridger E") (2), lower (60), Turtle Bluff (7), Twin Buttes (13), upper (68)

Lithologies: not reported (89), "siliciclastic" (1), claystone (2), mudstone (4), siltstone (3), sandstone (3), tuff (34)

Paleoenvironments: terrestrial indet. (356), fluvial indet. (34), crevasse splay (1), mire/swamp (1), lacustrine - large (2), pond (1), lacustrine indet. (1)

Age range: base of the Middle Eocene to the top of the Lutetian or 48.60000 to 41.30000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Ypresian56.0 - 47.8USA (Wyoming) (185669)
Ypresian - Lutetian56.0 - 41.3USA (Wyoming) (193357)
Bridgerian50.3 - 46.2USA (Wyoming) (16079 16080 16082 16083 16085 16086 16088 16089 16090 16091 16092 16093 16094 16095 16096 16097 16098 16099 16100 16101 16102 16103 16104 16105 16106 16107 16108 16109 16110 16111 16112 16113 16114 16115 16116 16117 16118 16119 16120 16121 16122 16123 16124 16125 16126 16127 16128 16129 16130 16131 16132 16133 16136 16142 16143 16144 16145 16146 16147 16148 16149 16150 16151 16152 16153 16154 16155 16156 16157 16158 16159 16160 16161 16162 16163 16164 16165 16166 16167 16168 16169 16170 16171 16172 16173 16174 16175 16176 16177 16178 16179 16180 16181 16182 16183 16184 16185 16186 16187 16188 16189 16190 16191 16192 16193 16194 16200 16201 16205 16206 16208 16209 16210 16211 16214 16216 16217 16219 16221 16225 16226 16228 16229 16232 16233 16234 16235 16236 16237 16243 16244 16245 16250 16253 16255 16257 16272 16273 16274 16275 16276 16277 16278 16279 16281 16282 16283 16284 16285 16288 16294 16296 16300 16301 16302 16303 16304 16305 16306 16307 16308 16309 16310 16311 16312 16313 16314 16315 16316 16317 16318 16319 16320 16321 16322 16323 16324 16325 16326 16327 16328 16329 16330 16331 16332 16333 16334 16335 16336 16337 16338 16339 16340 16341 16342 16343 16344 16345 16346 16347 16348 16349 16350 16351 16352 16353 16354 16355 16356 16357 16358 16359 16360 16361 16362 16363 16364 16365 16366 16367 16368 16369 16370 16371 16372 16373 16374 16375 16376 16377 16378 16379 16380 16381 16382 16383 16384 16385 16386 16387 16395 16399 16400 16402 16403 16404 16405 16406 16407 16409 16410 16414 16416 16417 16419 16420 16421 16423 16424 16425 16426 16427 16428 16429 16430 16431 16432 16433 16440 16441 16442 16448 16449 16453 16454 16455 16456 16457 16458 16459 16460 16461 16462 16463 16464 16465 16466 16467 16468 16469 16470 16471 16472 16473 16474 16475 16476 16477 16478 16500 16503 16504 16506 22631 22647 27269 27382 55207 59933 70145 70266 74504 75120 87311 99835 106325 127634 128447 129895 131939 136094 141584 144593 167354 168275 168276 168277 168278 168279 168280 168281 176700 176701 176702 176703 176704 176705 176706 176707 176708 176709 176710 176711 176712 176714 176715 176716 176717 176718 176719 176720 176721 176722 176723 176724 176725 176726 176727 176728 176729 176730 176731 176732 176733 176735 179965 180198 180199 180200 180521 182921 187924 187925 187926 191004 191005 191222 191223 191224 191225 191229)
Twinbuttean50.3 - 46.2USA (Wyoming) (22674)
Middle Eocene48.6 - 37.2USA (Wyoming) (81455 81456 81458 97759)
Early/Lower Uintan46.2 - 40.4USA (Wyoming) (93087 186964 186965 186966 186967 186968 186969)
Uintan46.2 - 40.4USA (Wyoming) (198266)