Lichen covers the slopes of a small cinder cone in southwestern Iceland. Taken from the rim of neighboring Grábrók.
Classic "fishmouth" boudin, filled with pegmatite.
Folded turbidites at Saligo Bay, Islay, Scotland.
After the twin tunnels of the northern Tröllaskagi Peninsula, lovely little Siglufjörður comes into view.
Causeway basalts over Chalk
Chalk, chert, and basalt dominate the lithologies of these well-rounded beach cobbles.
Thin, delicate scallop Placopecten clintonious fossils were collected from the Pliocene-aged Sunken Meadow Member of the Yorktown Formation.
Interior of these samples:
Hutton's classic unconformity (Devonian red beds over Silurian graywacke and shale).
Sill that intruded the Liassic shale on the east side of Portrush, Northern Ireland.
At the Caves of Cushendun, an arkosic conglomerate can be found.
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