Mascall Formation

Geology

Members: unnamed (28), Unit 2 (2), Unit 5 (10), Unit 6 (1), Unit 7 (1), Unit 8 (1)

Lithologies: not reported (12), sandstone (7), conglomerate (1)

Paleoenvironments: terrestrial indet. (42), lacustrine indet. (1)

Age range: base of the Hemingfordian to the top of the Barstovian or 18.50000 to 12.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Miocene23.04 - 5.333USA (Oregon) (18810 18814 18898 18923 18950 18951 18952 18953 18954 18955 18956 18957 18958 18959 18967 18968 18993 18994 18995 19025 19026 19028 19063 19064)
Hemingfordian18.5 - 16.3USA (Oregon) (208510 208511 208512 208513 212622 212623 212624 212625 212626 212627)
Hemingfordian - Barstovian18.5 - 12.5USA (Oregon) (18864 234344)
Barstovian16.3 - 12.5USA (Oregon) (18839 19027 19031 191985 210633 231010)
Early/Lower Barstovian16.3 - 12.5USA (Oregon) (230904)