Friday fold: Raplee Monocline
It’s Friday! Let’s head to Utah for a guest Friday fold photo – a river rat’s view of the Raplee Monocline!!
It’s Friday! Let’s head to Utah for a guest Friday fold photo – a river rat’s view of the Raplee Monocline!!
Today, let’s journey to Iceland, to a bit northwest of Reykjavík. This is a view from the top of the Grábrók cinder cone, across the valley to the east. With very few exceptions, Iceland is a big pile of basalt, and that shows through in the walls of this valley, which display a stack of … Read more
My family and I went canoeing this weekend, and one of the more photogenic things we saw on the river was this fine cut bank: The bank is being actively undercut by the river, as evidenced by the overhanging soil + grass carpet, the slump scarps at the bottom (showing fresh, wet soil), and the … Read more
A couple of weeks ago, before a series of snowfalsl altered my daily work routine in a destabilizing way, I took a walk through the braided floodplain / gravel fan of Passage Creek, where it exits the Massanutten Mountain system near the state fish hatchery. There, no longer restrained by the steep walls of quartzite, … Read more
New LiDAR imagery for the Fort Valley reveals bedrock structures and subtle aspects of fluvial geomorphology.
Hampshire Formation outcrops on Corridor H, West Virginia: [gigapan id=”178008″] link (Marissa Dudek) [gigapan id=”177198″] link (Callan Bentley) Faults in the Tonoloway Formation, Corridor H, West Virginia: [gigapan id=”176602″] link (Marissa Dudek) Conococheague Formation, showing stromatolites and cross-bedding: [gigapan id=”177155″] link (Callan Bentley) [gigapan id=”177355″] link (Jeffrey Rollins) Tiny folds and faults, from a sample … Read more
What hath the Potomac River wrought on the rocks of Mather Gorge? Some interesting shapes to the land surface reveal a fascinating history.
Check out the scene at Natural Bridge in Yoho National Park, British Columbia, Canada: Don’t confuse this “Natural Bridge” with the one in Virginia. Here, in the western Canadian Rockies, the structural geology is much better. You may recall that I’ve previously featured outcrops from nearby this site as a Friday fold. It’s a great … Read more
As soon as I got back from GSA, I had to run two field trips, back to back. Both are the same trip: my Historical Geology field trip to the Massanutten Synclinorium. Here’s yesterday’s crew perched on a moderately-dipping slab of Massanutten Sandstone along Passage Creek: Today, it’s the same routine all over again, though … Read more
Our three-day karst theme wraps up today with a visit to Natural Bridge, Virginia, an impressive sight: I went to Natural Bridge early last week to give a talk to a group of Road Scholars (an Elderhostel-like program) about the Snowball Earth. Part of my compensation for the talk was a night’s lodging at the … Read more