geosci lab4 - Kevin Harrison Joseph Okelarin Bob Guyer...

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Kevin Harrison Joseph Okelarin Bob Guyer Jovan Hinton Keith Crouse GEOSCI 001 Section 13 Lab #4 The Salona and Coburn Formations During this lab the class took a field trip to the east side of highway 322 so we could observe the Salona and Coburn rock formations. These formations were formed from the eruption of the Millbrig and Kinnekulle volcano’s about 454 million years ago. These eruptions left distinct evidence about the climate and tectonic position from the time they erupted thanks to the ash and other rock structures that formed as a direct result of the eruptions. For the Salona formation there were five distinct layers of rocks that were visible on the cutaway. The first was a roughly 3 and a half foot thick section of limestone that served as the base. Followed by about a foot of ash, which is from the eruption of the volcano, this was made especially visible because of the different color, texture, and large amount of plant life growing in this layer of sediment.
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