31 July 2015

Friday fold: a return to the duplex structure in the Gastropod Limestone

Posted by Callan Bentley

Some time ago, I featured as Friday fold the extraordinarily complex duplex structure to be seen in the Cretaceous “gastropod limestone” member of the Kootenai Formation at Sandy Hollow, Montana. Today, let’s take a deeper look through a couple of hand-shot GigaPan images:

Here’s the bigger of the two:

Here’s one with students for scale: