San Marcos Formation

69 distinct taxa, from 140 fossil occurrences the Paleobiology Database records under this name.

The Paleobiology Database files this name in 2 countries. That can be one body of rock crossing a border, or two rocks that happen to share a name. The database does not say which, so nothing below is added across them.

Baja California Sur · MX

40 taxa · 95 fossils · 5.3–2.6 Mya

Macrostrat dates this rock 4–3.3 Ma. Macrostrat’s own record

San Marcos Formation — 32.42°N, 117.25°WSan Marcos Formation — 26.00°N, 111.14°WSan Marcos Formation — 26.02°N, 111.35°WSan Marcos Formation — 27.10°N, 113.75°WSan Marcos Formation — 27.07°N, 111.98°WSan Marcos Formation — 27.08°N, 112.05°W

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6 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.

When

What has been found

Guadalajara · ES

29 taxa · 45 fossils · 461–460 Mya
San Marcos Formation — 40.93°N, 2.05°WSan Marcos Formation — 40.72°N, 1.55°W

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2 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.

When

What has been found

What else lived thenRank the rock of a period

Counts are of occurrence records, which measure the rock and the fieldwork together.