"Spaghetti" And Concentrically Laminated Stromatoporoids

"Spaghetti" stromatoporoids (an extinct calcareous sponge--the whitish strands in the darker matrix) from the Upper Devonian Lost Burro Formation, Panamint Range. Genus Amphipora.

Here is as second variety of stromatoporoid, a curious form of extinct calcareous sponge, commonly seen in the Upper Devonian Lost Burro Formation of the Death Valley region--the classically concentrically laminated stromatoporoids that frequently develop biohermal masses of tangled sponges scores of feet thick. This chunk was spotted in the Panamint Range. Genus, Stromatopora.

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