Explora Geologia, Rochas e outros!

Disjunção esferoidal (spheroidal jointing). Este tipo de disjunção de que resultam as estruturas esferoidais em as concêntricas, como as cebolas, comum em rochas básicas alternadas.

Disjunção esferoidal (spheroidal jointing). Este tipo de disjunção de que resultam as estruturas esferoidais em as concêntricas, como as cebolas, comum em rochas básicas alternadas.

Coal Seams, they stretch on for 20 mi. Usibelli Coal Mine, Healy, Alaska, in the mtns of the Alaska Range

Coal Seams, they stretch on for 20 mi. Usibelli Coal Mine, Healy, Alaska, in the mtns of the Alaska Range

Sand Dollar Fossil

Sand Dollar Fossil

fossils

fossils

Ammonites at the Smithsonian. Originating from within the bactritoid nautiloids, the ammonoid cephalopods first appeared in the Devonian (circa 400 million years ago) and became extinct at the close of the Cretaceous (65.5 Ma) along with the dinosaurs.

Ammonites at the Smithsonian. Originating from within the bactritoid nautiloids, the ammonoid cephalopods first appeared in the Devonian (circa 400 million years ago) and became extinct at the close of the Cretaceous (65.5 Ma) along with the dinosaurs.

wet rocks

wet rocks

Giant Ammonite, Lyme Regis by blinkingidiot, via Flickr

Giant Ammonite, Lyme Regis by blinkingidiot, via Flickr

Ammonite Fossils

Ammonite Fossils

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