Other geobloggers are writing about:
Here we are in the Brallier Formation, a Devonian turbidite sequence. Prominent in the middle of this photo is the Bouma “C” horizon with the cross- bedding.
Filed under: devonian, geology, gsa, primary structures, sediment, valley and ridge, west virginia | Comments Off
This one is also from the Millboro Formation: itty bitty brachs (not too much oxygen in those depths for building up big body sizes) that have been sheared during Alleghanian deformation.
Filed under: devonian, fossils, geology, gsa, sediment, structure, valley and ridge, west virginia | Comments Off
This photo is from the Millboro Formation: mostly deep water black shale, but with the occasional heavy turbidite coursing in and settling its bulk down on the squishy mud beneath. Some folks on our trip suggested these might be seismites: soft sediment deformation resulting from earthquake-induced vibration.
Filed under: devonian, geology, gsa, primary structures, sediment, valley and ridge, west virginia | Comments Off
Oriskany sandstone, folded into an S-fold, then snapped down the middle!
Filed under: faults, folds, geology, gsa, structure, valley and ridge, west virginia | Comments Off
Hoo-hoo! An anticline in the hanging wall of a thrust fault in the Valley & Ridge. This is the redbeds of the latest-Ordovician Juniata Formation. Lynn Fichter for scale.
Filed under: faults, folds, geology, gsa, ordovician, sediment, structure, valley and ridge, west virginia | Comments Off
This is a nice sample of slicks. On the other side, burrows! I like that: a primary structure on one face, a secondary structure on the opposite side.
Filed under: faults, geology, gsa, ordovician, primary structures, structure, valley and ridge, west virginia | Comments Off
Looking north along the Germany Valley, which lies in the core of a breached plunging anticline. The topography is defined by the erosion-resistant ridge of Tuscarora Sandstone. This is the Wills Mountain Anticline. The Tuscarora is Silurian; at the bottom of the valley (core of the anticline), you find Ordovician carbonates.
Filed under: folds, geology, gsa, valley and ridge, west virginia | Comments Off
Fault-duplicated double section of the (Silurian aged) erosion-resistant Tuscarora Sandstone:
Filed under: faults, geology, gsa, north america, silurian, structure, valley and ridge, west virginia | Comments Off
Sweet hackles on the right; pen for scale.
Filed under: geology, gsa, joints, structure, valley and ridge, west virginia | Comments Off
Where are some ripple marks in the Hampshire Formation. Cell phone service is a lot more localized here in West Virginia, so we’ll see how many posts I manage today…
Filed under: devonian, geology, gsa, primary structures, sediment, valley and ridge, west virginia | Comments Off
