Collected at Sharp Top, Blue Ridge province, Virginia. Flip it over and have a look at the other side of the sample, here: gigapan.com/gigapans/183044
Causeway basalts over Ulster White Limestone (the Chalk).
Archean BIF from the Barberton GeoTrail. Obverse of the sample can be seen here: gigapan.com/gigapans/190971.
Archean "crinklies" viewed in cross-section. Note the prominent black chert cobble draped in microbial mat material.
What is the evidence for post-depositional deformation at this site, if any?
Primary dessication structures in modern tidal mudflats.
Columnar basalt at a seaside location in County Antrim.
A sample of the fern Neuropteris from a nodule in the Mazon Creek area.
Image capture by Graham Bird of GIGAmacro.
Fantastic cliffs and sea stacks covered in nesting guillemots, razorbills, and gulls. Very impressive. Very stinky.
From the structural geology collection of Carol Simpson and Declan De Paor.
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