Publication: [2094] Stratigraphic and petrologic analysis of the Lower Cretaceous Blackleaf Formation and the Upper Cretaceous Frontier Formation (Lower Part), Beaverhead and Madison Counties, Montana




Documented Paleocurrents


# Continental Area Stratigraphic Level Total Records Period Latitude Longitude Tectonic Plate Deposition Environment Paleocurrent Type Lithology Formation
1 North American Lower Cretaceous 12 33711 45.3 -112.68 North American marine shallow crossbedding sandstone Blackleaf
2 North American Lower Cretaceous 12 33711 44.53 -112.44 North American marine shallow crossbedding sandstone Blackleaf
3 North American Lower Cretaceous 12 33711 44.58 -112.44 North American marine shallow crossbedding sandstone Blackleaf
4 North American Lower Cretaceous 12 33711 45.25 -112.64 North American marine shallow crossbedding sandstone Blackleaf
5 North American Lower Cretaceous 12 33711 45.25 -112.64 North American marine shallow crossbedding sandstone Blackleaf
6 North American Lower Cretaceous 12 33711 45.26 -112.65 North American marine shallow crossbedding sandstone Blackleaf
7 North American Lower Cretaceous 12 33711 44.64 -112.37 North American marine shallow crossbedding sandstone Blackleaf
8 North American Lower Cretaceous 12 33711 44.57 -112.42 North American marine shallow crossbedding sandstone Blackleaf
9 North American Lower Cretaceous 12 33711 45.24 -112.65 North American marine shallow crossbedding sandstone Blackleaf
10 North American Lower Cretaceous 12 33711 45.26 -112.64 North American marine shallow crossbedding sandstone Blackleaf
11 North American Lower Cretaceous 12 33711 45.27 -112.65 North American marine shallow crossbedding sandstone Blackleaf
12 North American Lower Cretaceous 12 33711 45.23 -112.66 North American marine shallow crossbedding sandstone Blackleaf