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Gondwana Rocks | Doug Thost › Portfolio › The Rock That Split Gondwana

Dinosaurs In Their Time, Carnegie Museum of Natural History. Image Credit: Desiree N. Williams, via Flickr.

Petoskey stones ~ fossilized coral that lived 350 million years ago - the rocks rounded in the surf along the shore of Lake Michigan near Petosky, Michigan

***GEOLOGY!*** by coquinete, via Flickr

Banded iron formation - Soudan iron-formation member of the Ely Greenstone | Flickr - Photo Sharing!

folded radiolarian chert What's beneath your grass-covered hills? by cocoi_m, via Flickr

Weathering of Rocks and Erosion in the Dolomites - Flickr - Photo Sharing!

Durdle Door Layers, alternating folds of Portland limestone & shale, near Lulworth | Jurassic, 140 Ma