You are browsing the archive for 2011 May.
31 May 2011
This weekend, we went backpacking with our friends Seth and Anne, at Dolly Sods in West Virginia. As usual, I took pictures. Not so much of rocks this time, but there were lots of springtime buggies crawling about, and you know how I like to shoot macro photos of small critters… So here you go: Mating dragonflies: Grasshopper nymph (juvenile): Moth (on my fingertip): A very large ant hill: Weevil …
27 May 2011
Today’s Friday fold takes me back 25 years, to when I visited the Outdoor Lab with my science class in Arlington County Public Schools. I revisited this exemplary outdoor education facility on Tuesday, at the invitation of its director, Neil Heinekamp. Neil wanted a geology “expert” to take a look at their rocks, and I wanted a chance to check out their rocks as part of my expanding examination of …
26 May 2011
Here’s a gigapan I shot yesterday, looking north at the contact between the New Market and Lincolnshire Formations at the classic “Tumbling Run” outcrop south of Strasburg, Virginia: See if you can find the E. coli plush toy I included, or the cm-scale pencil! As usual, you can see it full screen, by clicking on the word “Gigapan” in the lower right.
Here’s a gigapan I shot last Saturday, looking north from Signal Knob, Virginia: As usual, you can see it full screen, by clicking on the word “Gigapan” in the lower right.
Here’s a gigapan I shot last yesterday, looking west from “Blue Hole” towards a cliff of Massanutten Formation sandstone, south of Waterlick, Virginia. A prominent fault zone can be seen in the center of the image. Unfortunately, the auto-stitch deformed my face. I look like Quasimodo. Oh well. As usual, you can see it full screen, by clicking on the word “Gigapan” in the lower right. There, you can find …
25 May 2011
“Did somebody say bugs?” …Yes, Mr. Lizard, it’s time for a photo gallery of the macro bugs I saw this past weekend. We got some caterpillars for you, some millipedes, and also a very cool moth. Feast your eyes! Unidentified caterpillar 1: Underwing caterpillar (?): Unidentified caterpillar 2: Millipedes: (See also here, if you haven’t already) Sigmoria trimaculata millipede: (At least that’s what I think it is.) Luna moth: …
24 May 2011
While exploring the Rock Creek Cemetery last week, I noticed a couple of other interesting graves. This one, made of limestone, shows nice “reverse” cross-bedding: Here; I dialed up the contrast a bit to highlight these cool primary structures: It’s “reverse” because the tilting direction of the cross-beds switches from left (at the bottom) to right (for the bulk of the section). Ergo, the current started off flowing towards the …
23 May 2011
This morning, my cat Lola (a.k.a. “LOLa”) had squirmed herself in between the sheets, and it reminded me of something: If this pose inspires you to another LOLcat caption, you can click through for the original image file, unadorned. Modify it as you like, and give us a link to your creation in the comments on this post! Have fun.
A doubly-terminated quartz crystal (or “Herkimer diamond”) is found on a hike in the Silurian sandstones of Virginia’s Valley & Ridge province.
22 May 2011
Callan shows off a new hallway display in his building at Northern Virginia Community College, showcasing the numerous geologic provinces of northern Virginia (as well as adjacent mid-Atlantic states).