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Geology: Walk Through Time

Johnnie Formation

Sample of rock from Johnnie formation
4,000 foot thick, 600+ million years old. The Death Valley region was on the margin of a rising and falling sea for 300 million years. The purple mudstone was formed in a near-shore marine environment.

Precambrian > Proterozoic eon > Neoproterozoic era > Ediacaran period

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GF1. Chloride Cliff - Mojave Desert

At the junction (10.9 miles from the highway), you cross the Boundary Canyon detachment and the steep climb up the hill is through the Johnnie formation,

Striped Butte in Butte Valley

Steeply tilted limestone beds of the Permian Anvil Spring Formation. A major fault behind the butte separates it from Precambrian Noonday and Johnnie ...

Oo.

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