THE DYNAMIC EARTH: A BLOG ABOUT GEOLOGY AND THE EARTH SCIENCES

Monday, April 6, 2009

Sunday Sed Structures - Fashionably Late Edition

Monday already! Hot Damn! Being punctual is for considerate, thoughtful losers anyway! Here's your (late) sed structure picture for the week!



Imbricated fusilinids! This picture is from the Guads, right off the Permian Reef Trail. The trail is pretty darn slick, allowing you to walk up through the stratigraphy of a Permian Reef buildup. The toe-of-slope deposits are commonly dominated by calciclastic debris, often in the form of thin, fossil-rich turbidites. Anyway, the picture above shows some big ol' forams that have been washed down from behind the reef, in the process getting sorted and imbricated.

See!?! Hydrodynamics ARE important in carbonates!

1 comment:

Mona Albano said...

I've seen those, or something similar, in the limestones around the Niagara Peninsula, especially in blocks lining the Welland Canal--but who knows whence they were moved.
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