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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.

Igneous Rock-Peridotite « Sandatlas- Dunite (almost entirely made of olivine mineral crystals) from Lanzarote~gorgeous!

Igneous Rock-Peridotite « Sandatlas- Dunite (almost entirely made of olivine mineral crystals) from Lanzarote~gorgeous! Of course, it might just be Kryptonite! Several visits with Chris.

Sedimentary layers with bands of hematite, magnetite (gray/black), and jasper (red) in Precambrian banded iron formations (BIFs) of northern Michigan.

msugeology: Sedimentary layers with bands of hematite, magnetite (gray/black), and jasper (red) in Precambrian banded iron formations (BIFs) of northern Michigan, USA

the Red Chalk, and the Ferriby Chalk (white) extending to the cliff-top ...

Hunstanton (UK) geology diagram by Roy Shepherd. Approx age - my / Fossil diversity - ammonites, belemnites, bivalves

~~Fairy Land : Zhangye Danxia Landform by baddoguy~~

Rock formations at the Zhangye Danxia Landform Geological Park in Gansu Province, China.

Amazing Geologist ⚒ Anticline Folds - Zimapan, Hidalgo, Mexico |#Geology *Photo : © Marco Helu visit : http://www.geologyin.com/

Amazing Geologist ⚒ Anticline Folds - Zimapan, Hidalgo, Mexico |#Geology *Photo : © Marco Helu visit : http://www.geologyin.com/

Fold found in a specimen of float of the Purcell (Belt) Supergroup limestone in Waterton Lakes National Park, Alberta, Canada.

Fold found in a specimen of float of the Purcell (Belt) Supergroup limestone in Waterton Lakes National Park, Alberta, Canada. (It always amazes me how fluid stone was at some point in it's history!

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