Images On the Topic of Proterozoic

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Nonconformity

A "nonconformity" is a type of discontinuity surface where sedimentary rocks lie above crystalline rocks. The dashed line in the picture marks a nonconformity between the Mesoproterozoic Pikes Peak Granite (bottom/right) and the Pennsylvanian conglomerates of the Fountain Formation (top/left), near Denver, CO. The contact in this outcrop (near Red Rocks Amphitheater) is marked by a plaque.

unconformities discontinuity surfaces granite Proterozoic Precambrian Pennsylvanian conglomerate

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Research partially funded by the Geoscience Research Institute has been published in an invited review…

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First Jurassic to earliest Cretaceous dinosaur footprints for Bolivia at the Castellón formation (Tacurú Group), Tarija

Bolivia continues to be a treasure trove for the study of dinosaur footprints. A recently published paper,…

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Images On the Topic of Proterozoic

Nonconformity

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Did the Wutach Gorge (Baden-Württemberg, Germany) Form Rapidly?

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A Synthesis of the Peruvian Coastal Batholith: An Exploration of Temporal Histories, Causes of Compositional Diversity, and Tectonomagmatic Links in Arcs

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GRI Leads Field Trip for Science Educators in Northern Arizona

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First Jurassic to earliest Cretaceous dinosaur footprints for Bolivia at the Castellón formation (Tacurú Group), Tarija

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