Yesterday, I took five new GigaPans at Thoroughfare Gap, a water gap where Broad Run cuts through Bull Run Mountain, the eastern limb of the Blue Ridge Anticlinorium at my latitude. The rocks here are the Cambrian-aged Chilhowee Group, with bedding tilted moderately to the east during Alleghanian mountain-building in the late Paleozoic. To the … Read more
After Passage Creek receded following last week’s flood, I went down to the bridge and the floodplain to have a look around. Here’s a little bit of what I saw… Let’s start at the bridge itself. The view is to the west, and Passage Creek flows north: On the other side of the bridge, looking … Read more
After a night of torrential rain, Callan wakes to find his sole (vehicular) route to the outside world under several feet of flood water.
Today, we take a look at an outcrop of young, basically unlithified sediments east of Bishop, California, on the way out Poleta Road, toward the White Mountain Research Station’s Owens Valley Lab, where you can get a nice view of the Coyote Warp Relay Ramp. These photos were taken just west of the bridge over … Read more
The Friday fold is seen at one of the stops on Callan’s pre-GSA-Charlotte field trip: a small waterfall in North Carolina’s Inner Piedmont.
The storm treated us well last night. We got some rain and some consistently moderate wind, but nothing insane. When I got up this morning, I checked the stream gauge online, and saw that Passage Creek was up significantly, and perhaps over the little low-water bridge that connects our house to the outside world. So … Read more
NASA’s Earth Observatory posted a colorful confluence image last Thursday, and it reminded me that I have a similar site of my own to share. This is on the Icefields Parkway, north of the Athabasca Glacier and Snow Dome, a hydrological drainage triple point. Here, we’re a short distance into the Arctic Ocean drainage. (West … Read more
Last Thursday, I shot a few GigaPans of moderately-dipping quartz sandstone layers (the Silurian-aged Massanutten Formation) in the creek a few miles from my house. All four GigaPans are at popular local swimming holes. The first three are from Red Hole, and the last one is from Blue Hole. Check them out: [gigapan id=”113761″] link … Read more
A weekend expedition to GigaPan the C&O Canal’s singular Paw Paw Tunnel results in an exposition on Devonian sedimentation, Alleghanian mountain-building, structural geology, and the incision of the Potomac River to produce entrenched meanders.