Looking west along the coast.
Causeway basalts over Chalk
Mid-Atlantic ridge related rifting, above sea level!
Inside a narrow rift along the western margin of the Þingvellir Vallley. North American Plate to the left; Eurasian Plate to the right.
Causeway basalts over Cretaceous Ulster White Limestone (the Chalk).
Handheld panorama of the site. Causeway basalts (Paleocene) over Cretaceous Ulster White Limestone (the Chalk).
Causeway basalts over Ulster White Limestone (the Chalk).
with cross-beds and pebbles. Corridor H, West Virginia.
Flip side of the sample here: www.gigapan.com/gigapans/187778
A volcanic contact; potentially a sort of unconformity!
Sample courtesy of Ken Rasmussen and his colleague, the Baltimore-based archaeologist Henry Ward.
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