Flatlying strata from a Permian lake, exposed in coastal western "Mainland" Orkney
Chalk, chert, and basalt dominate the lithologies of these well-rounded beach cobbles.
Mudcracks in limey red shale with a mud chip and raindrop impressions.
with pebbles and cross-beds.
Flip side of the sample here: www.gigapan.com/gigapans/188209
Mariopteris, most likely Mariopteris nervosa, a liana-type seed fern from the early Carboniferous.
Conifer cone from Poland.
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