Callan Bentley As I’ve mentioned previously, I spent some time making GigaPans this summer out west. Here’s Lily and me on the crest of the Bridger Range, enjoying the clear skies and great geology: When this portrait was taken (by our friend Lindsay), I was shooting this GigaPan: link Try exploring it to see if you can … Read more
Periodically, I review books here. Usually, I do them one at a time, but at this point, I’ve been delinquent enough in my book reporting that I’ve got a big backlog. So I intend to just bomb through them, clearing out my backlog of unblogged books in one fell swoop post. This consolidation is probably … Read more
These “caterpillars” are the larvae of the pine sawfly, Neodiprion sp. They were grazing on a small pine in my front yard. Sawflies are relatives of bees, wasps, and ants – they’re members of the Hymenoptera. But their larvae look so much like the larvae of butterflies and moths (Lepidoptera) and flies (Diptera), don’t they? … Read more
I volunteer on Wednesdays at the Fort Valley Public Library. We have some bushes out front, and in the past month, I’ve noticed something about the bush closest to the library door… It’s having some trouble, and the trouble seems to be coming from… (( brace yourself )) … a colony of spiders! You’re seeing … Read more
The Friday fold returns to Canada this week, with a look at an internally crumpled mountain along Alberta’s Kananaskis Trail…
One thing that’s 100% worth doing if you find yourself visiting Natural Bridge, Virginia, is to pop in for a visit at Foamhenge, an art installation a few miles away. Foamhenge is a full-scale replica of Stonehenge, made of styrofoam (covered in gray latex paint). It’s a few years old now, so it’s begun to … Read more
A final post from my visit to the Laramie Range with Bob Bauer and Fred McLaughlin earlier in the summer -Recall that there is schist and granite at this site, and much of the granite shows cross-cutting or inclusive relationships indicating it is younger than the schist, while still younger mafic dikes cross-cut than the … Read more
Lily and I took our son to the Virginia Scottish Games on Sunday. This is an annual competition of events in traditionally Scottish feats – throwing heavy things, mainly. There is also fried food, whisky, and some terrific music. The event is held at the Great Meadow, south of The Plains, Virginia. I had never … Read more
In areas of soil protected from the rain, we find antlion pits in our yard… These are traps, dug and maintained and occupied by the larvae of the family Myrmeleontidae. When a passing insect stumbles in, the antlion will throw sand grains and cause the hapless bug to tumble down, where the antlion snags it … Read more
My NOVA colleague Shelley Jaye brought this gorgeous banded iron formation fold back from the Archean of Montana: Gorgeous to think about what this rock represents: (1) an anoxic atmosphere, a world where iron was able to dissolve in seawater; (2) some addition of oxygen, causing the iron to precipitate out as iron oxide minerals, … Read more
This is the fourth of several guest posts that appear here this week, all written by students who participated in this past summer’s Regional Field Geology of the Northern Rocky Mountains course. by Tony Robinson Old Dominion University [youtube=”www.youtube.com/watch?v=XTWNmUNbBBU”]
This is the third of several guest posts that will appear here this week, all written by students who participated in this past summer’s Regional Field Geology of the Northern Rocky Mountains course. by Matthew Mann University of Virginia The Huckleberry Ridge Tuff is a 2.1 Ma tuff deposit that is centrally located in Yellowstone … Read more
This is the second of several guest posts that will appear here this week, all written by students who participated in this past summer’s Regional Field Geology of the Northern Rocky Mountains course. by Cate Pearson University of Virginia A drive along Going-to-the-Sun Road is an amazing experience for many reasons. To any traveller, the … Read more
This is the first of several guest posts that will appear here this week, all written by students who participated in this past summer’s Regional Field Geology of the Northern Rocky Mountains course. by Madeleine Rushing Northern Virginia Community College Sedimentary deposition typically is seen as horizontal strata, layered one on top of the other … Read more
I’m pretty sure this guy is advertising himself as inedible…
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
To continue with the karst theme I initiated yesterday, let me share a few photos today from a visit last week to Luray Caverns, a large show cave in Page County, Virginia near the town of Luray. This was my first visit to Luray Caverns since I was a child. Probably it had been thirty … Read more
Take a look at this… Doesn’t look like much, does it? But it’s actually the surface expression of a vast, long-lived sinkhole. If you walk over to the hole and look in, you can’t see the bottom. It’s semi-supported by limestone boulders, but between the boulders, the soil and gravel filter down, down, down, like … Read more
My neighbor, the artist Diane Artz Furlong, photographed these extraordinary caterpillars in her garden last week. With her permission, I’m reposting the photos here… Diane writes that, Just when I thought I was done with the Japanese beetle onslaught (not!) I find these guys on my rose bush. I would never have found them, though, … Read more
Today, a view to the southwest, from close to the hinge of the main anticline in the Sandy Hollow area, a classic geological field mapping locality in southern Montana: Triassic-aged Dinwoody Formation dominates the main part of the scene. Note how the strike and dip of the positively-weathering strata wrap around. Our Rockies students mapped … Read more