Geology Field Class Crafton Hills College

09/17/2022

These Oligocene carbonate sediments exposed on the Ionian Island of Antipaxos are, to put it politely, deformed.These are syn-sedimentary slump folds, meaning, they were formed by the deformation of these strata while they were still, essentially, mud on the bottom of the Oligocene sea. When these layers of muds were deposited on a slope, some small trigger (such as an earthquake) added just enough force for them to detach, and start sliding down slope – sort of a sub aquatic avalanche of slippery sediments. The sediments were in the initial stages of lithification, strong enough to hold together, but mushy enough to fold. In sliding downwards, they deformed, they rotated, they became a true mess, even as in this outcrop, looking as if they’re in knots.

Credit: Miltos Andreadis

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11/12/2018

Known in Romania as “Trovants” the stones of Costesti, Romania are a type of sandstone concretion that secrete cement and can at times appear to grow as if alive.

04/20/2017

Here is our new Geology field class page. Check it out and like it! Thanks!

University

04/20/2017

West Mojave Desert Field Class