Horseshoe Canyon Formation

Geology

Group: Edmonton

Members: unnamed (48), Bleriot (1), Carbon (1), Drumheller (5), Horsethief (22), Morrin (5), Morrin/Tolman (2), Tolman (15)

Lithologies: not reported (56), "siliciclastic" (7), claystone (3), mudstone (4), "shale" (5), siltstone (2), sandstone (21), conglomerate (1), ironstone (4)

Paleoenvironments: marine indet. (1), terrestrial indet. (87), marginal marine indet. (1), coastal indet. (1), coarse channel fill (3), "channel" (1), wet floodplain (3), "floodplain" (1), fluvial-lacustrine indet. (1)

Age range: base of the Late/Upper Campanian to the top of the Late/Upper Maastrichtian or 83.50000 to 66.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6Canada (Alberta) (14500 14501 52480 124953 138968 152280 152403 155222 214477)
Middle Campanian - Late/Upper Campanian83.5 - 70.6Canada (Alberta) (115108)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0Canada (Alberta) (28548 34373 34744 45752 51965 51966 64436 64629 64631 67612 144539 152272 150979 152268 152270 152271 155224 167798 189568 191253 191402 206395 206396 206397 206399 206401 235954)
Early/Lower Maastrichtian70.6 - 66.0Canada (Alberta) (11899 11900 11901 11902 11916 33623 34163 34164 34166 45732 45733 155226 46351 48624 49079 49234 51316 52465 52466 52467 52468 52469 52479 55363 60563 61628 61629 64324 64430 64432 64630 69621 76062 79692 92963 94370 96455 96457 97797 135739 135740 135741 135743 144561 155223 155225 155227 156799 173060 180856 191401 191252 191254 191366 191367 193696 204724 220119 220501 224151 229966)
Late/Upper Maastrichtian70.6 - 66.0Canada (Alberta) (75475)