Day #40 Deskcrop: Orbicular Diorite

Today’s deskcrop displays a rather uncommon igneous texture: orbicular comb layering. I first heard about this remarkable texture in a talk at Colgate University by D. Brooks McKinney of Hobart and William Smith College. I didn’t get out to the site to observe these remarkable structures in their natural habitat until a couple years later in grad school, but the hike was well worth it for both the rocks and the view.

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Orbicular Diorite

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