Peridotite mantle xenolith in basalt (near Mount Trumbull, Arizona, USA)

            Peridotite mantle xenolith in basalt lava from Arizona, USA. (public display, Geology Department, Wittenberg University, Springfield, Ohio, USA)

The greenish-colored mass is a sample of mantle rock.  It's a xenolith nodule in basalt lava that was erupted from a volcano.  The rock was plucked from deep wall rocks during the ascent of magma during the Late Pleistocene.  The xenolith itself is peridotite, an olivine-rich, ultramafic, intrusive igneous rock.  Peridotite has a phaneritic texture (= coarsely-crystalline) and formed by slow cooling.
 
Locality: unrecorded/undisclosed site near Mount Trumbull, Arizona, USA

Some rights reserved

Taken on: March 24, 2018

Tags:

peridotite

mantle

xenoliths

olivine

dunite

basalt

nodule

nodules

Mount

Mt.

Trumbull

Arizona « less

Sets appears in: • Arizona Rocks & Fossils • Basalt more » • Xenoliths « less

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