This is a new, useful tool: an online map that can guide you to rough information about local geology, and then to detailed geologic maps. The National Geologic Map Database appears to be a joint project between the USGS and the Association of American State Geologists. Here's what it looks like when you go to the website:




You can then close the little "About" information tab in the lower right:



Next, grab the screen and scroll to an area that you're interested in:



Double-click or use the "zoom" lever at upper left to zoom in:



Open the "Map Unit Info" tab to select individual map units and learn more about them:



After you do that, clicking anywhere in the map will bring up information about the rock units generally found in that area:



If you need more information, hover over the rock unit name in the "Map Unit Info" tab:



Close the "Map Unit Info" tab and open the "Map List" tab to get a list of all the USGS geologic maps available in your field of view:



Click on one of them to open up a red "footprint" on the map showing the area it covers:



An additional window will pop up with information about the map. Click on the number "2" in this new window to open the map itself:



It opens in a new tab, and is initially quite zoomed-out:



But you can zoom in, of course:



In fact, you can zoom in really far, until you start seeing pixels:



There are some design flaws in the interface, but overall, I think I'm willing to overlook them so I can get access to this sort of information. It strikes me as very, very useful: a rich dataset, waiting to be mined.

Labels: geology, maps, websites

Yet five more of the maps I scanned from my recently-entered-the-public-domain copy of Vernon Quinn's book A Picture Map Geography of the United States. As before, clicking on the image will take you to a bigger version of the map. Enjoy!

Labels: art, books, connecticut, maps, maryland, new york, oregon, washington

Five more of the maps I scanned from my recently-entered-the-public-domain copy of Vernon Quinn's book A Picture Map Geography of the United States. As before, clicking on the image will take you to a bigger version of the map. Enjoy!

Labels: art, books, california, georgia, idaho, maps, utah, west virginia

Labels: art, books, colorado, indiana, louisiana, maps, michigan, new mexico

Labels: arizona, art, books, delaware, maine, maps, new jersey, pennsylvania

Lola helps me plan a winter break journey...

She goes berserk for large expanses of paper... A few minutes after I took this picture, the little brat punched a hole in the map and ran off in a sprint. Sheesh.

Labels: argentina, chile, lola, maps, patagonia, south america, travel

Working through my RSS feed from the past week when I was out of town: Sheesh, it sure builds up if you don't stay on top of it! A couple of notable items to share:

The geography of tapirs, from the Why Evolution Is True blog.

The declining emphasis on literacy in our society, from Alternet.

Women geoscientists who read and/or write blogs: complete this survey!, from Kim.

Outcropedia, a new web project to catalog and share key outcrops.

Climate change graph jam, from Tamino. (With follow-ups from Lockwood)

Skeptics & athiests visit the Creation Museum. (ABC News)

Labels: blogs, evolution, graphics, humor, maps, politics, websites

Last week, I visited the Taconian Unconformity in the Catskills region of New York. I found out about the outcrop via the informative website the USGS put together in 2003 to explain southeastern New York's varied and interesting geology (Click here for a map).

Here's me at the angular unconformity, demonstrating the layering with my forearms:


Here's the same outcrop, sans goofball, avec annotations:


This is a classic angular unconformity. It even graced the cover of the (excellent) GSA publication Excursions in Geology and History: Field Trips in the Middle Atlantic States (Frank Pazzaglia, editor; cover photo by Marli Miller). Why should we care? Because like the "original" angular unconformity at Siccar Point in Scotland (described by James Hutton), this outcrop represents a lot of geologic time. First, during the Ordovician period, the Austin Glen formation had to be deposited as layers of clastic sediment in an ocean basin. Then, during the late Ordovician Taconian Orogeny, those layers had to be deformed: folded and buckled so they stood up on end, and then eroded down to their nubs. Then, on that newly-formed erosional surface, a fresh layer of sediment had to be laid down, in this case, the Rondout Formation was deposited as a layer of carbonate mud during the late Silurian period. Then, that too was deformed, during the Devonian period's Acadian Orogeny. Finally, the whole package had to be uplifted to the surface and exposed (in this case, when a highway roadcut was completed). That's a lot of time!

I'm delighted to have had the opportunity to visit it first-hand!

Labels: devonian, maps, mountains, new york, ordovician, silurian, structure, travel, unconformities

Virginia geologic map overlay for Google Earth -- you can click on the different units and it will tell you what rock type/formation they are. Pretty cool. Kind of clunky when I loaded it up on my home computer this morning, though.

Hat tip to Kyle House's Geologic Frothings blog for the alert.

Other states available too.

Also worth noting is an interactive Potassium-Argon age date map. In Virginia, you can use it to find the age of the lamprophyre dikes at the upstream end of Mather Gorge (~369 Ma) or find Alleghenian-aged pegmatites, or look at Triassic diabase ages contemporaneous with supercontinent breakup.

Labels: art, geology, google, isotopes, maps, tech, virginia

This map of the country of Mongolia was featured on the wall of Mongo's Mongolian Barbeque restaurant* in Quito, Ecuador. It is rendered in cowhide, with colored bits of leather doing all the decoration and adornment. It's really a pretty impressive work of art: cartographically accurate (with some omissions due to space constraints close to Ulaanbaatar), but also beautiful. It did not have a key or legend with it, but blue blobs represent lakes (like these). Yellow areas appear to represent high-elevation areas. Off-white appears to represent steppe, though the distribution shown on this map is not exactly how I would have drawn it. Brown circles are "major" cities, while blue circles represent villages. Of particular note to me was that my Peace Corps site, the itty-bitty village of Ereentsav, is located on the map, probably because it's a border-crossing town with Siberia. It's one of the two little blue dots in the northeast (upper right) of the map. Google Maps can show you the town's location on the Siberian border, though they spell its name differently ("Ereencav"):



Incredibly, the satellite photos for this region of the world are good enough that you can zoom in and see the house I lived in when I served there. See the green building in the middle? I lived in the little shed (half as wide as the green building, a little longer) just to its right (east). My outhouse is even visible -- the little square nubbin in the southern corner of the fenced-in area:



___________________________________________________________________

* "Mongolian Barbeque" is a branch of Inner Mongolian cuisine. Inner Mongolia is an autonomous region in China, with decent food. "Outer" Mongolia is the country of Mongolia, its own nation, distinct from China. I served there in the Peace Corps in 1998-1999, and I can tell you from experience that they do not serve especially good food. Maybe that's being too harsh... Let's just say that in Mongolia, you don't eat Mongolian Barbeque.

Labels: art, ecuador, maps, mongolia

Strange Maps has an interesting piece up today about where West Virginia came from (as a state): turns out it was all about the Civil War. The accompanying map shows the original proposed name for West Virginia, "Kanawha," as well as a proposed demarcation between Virginia and Maryland that trended along the western margin of the Blue Ridge physiographic province. If this boundary had come to pass, Virginia would have gotten the Valley & Ridge province, but Maryland would have retained the Blue Ridge, Piedmont and Coastal Plain.

Labels: blogs, blue ridge, coastal plain, history, maps, maryland, piedmont, valley and ridge, virginia, west virginia

Over the winter break, I read the new book Ancient Landscapes of the Colorado Plateau, by Ron Blakey & Wayne Ranney. This is an excellent read, and a terrific introduction to the geologic history of one the world's most dramatic landscapes. Blakey's maps have been featured on this blog before, and he has been kind enough to allow me to modify some for use on my field course websites (like here and here and here). The book goes through geologic time and makes extensive use of beautiful paleogeographic maps to reveal the story of mountain-building, transgression, regression, sand-dunes, faulting, volcanism, and erosion that characterizes the Colorado Plateau. It's not just paleogeographic maps, by the way: there are also plenty of shots of fossils, Colorado Plateau landscapes, and comparable modern depositional environments to enliven the story. It's a graphic story, well told with excellent graphics. I recommend you get yourself a copy if you've ever been to the Colorado Plateau, or if you ever plan on going there.

Find the book: On Amazon ... At the NOVA library

Labels: arizona, art, books, colorado, maps, new mexico, utah

What's the tallest mountain on Earth? Most would say Everest, since it's the highest point above sea level. I mentioned this issue as part of my lead-in to my Mauna Kea post, since some folks might claim Mauna Kea as the tallest, since it rises the most above its base on the oceanic crust of the Pacific Plate. But there's a third contender: Mount Chimborazo, in Ecuador.

The planet Earth is not a perfect sphere; it bulges a bit at the equator (about 13 miles) compared to the poles. The result is that if you look at two mountains of exactly the same elevation, one located at the pole and one at the equator, the equatorial one will be 13 miles further away from the center of the Earth than the polar one. That makes the peak of the tallest equatorial mountain (Chimborazo is at ~1.5 degrees south) the point on Earth that is furthest away from the center of the planet. It is 1.3 miles (2.1 km) further away from the center of the Earth than the summit of Everest is. NPR covered this surprising statistic in an entertaining piece in 2007. However, as the commenter on this post-NPR post notes, it's not just the silicate earth that bulges at the equator, it's the atmosphere, too. So it's not like the air is thinner at Chimborazo than Everest. You may be closer to the Moon atop Chimborazo, but you're not closer to "space" due to all that extra thick atmosphere above your head.

Here's a Google Maps "terrain view" map of Chimborazo (high relief peak east of El Arenal):


I had hoped to "auto-post" this while I'm traveling in Ecuador, for about the same time I would be looking at Chimborazo with my own eyes. However, I got sick over the holidays, and the persistent illness forced me to change my travel plans. I'll still be going to Ecuador -- but only for one week instead of the planned two. And I still hope to catch a glimpse of Mount Chimborazo. Hopefully when I get back to DC, I'll be able to share some photos of this superlative mountain. For now, the map will have to do.

Labels: ecuador, maps, mountains, south america, travel, volcano

Check this out: planners of next month's inauguration are using a giant map to figure all the logistics out.

Labels: dc, maps, news, politics

Labels: geology, maps, montana

A good post yesterday on Andrew's geology blog at About.com : "How many plates are there?" Some excellent points made, and made well.

All in favor of drawing the Somali Plate as its own entity on plate tectonic maps? Aye!

Labels: blogs, maps, plate tectonics

Four years ago, this website gave me some solace in looking at the breakdown between "red" and "blue" states. Now the author, Mark Newman, has performed some similar cartography on the 2008 presidential election results.

Labels: maps, politics, websites

Yesterday, I pulled up the Venetian blinds in my office window at NOVA, and this is what I saw:


Naturally, I had to take a photograph. It's puuurty.

While I had the camera out, I figured I'd shoot a few photos of the rest of my office, since it's full of all sorts of interesting clutter. Rather than explaining what all the doodads are in these photos, I figured it would be more fun to just post them and see if you can identify them all:















Have fun!

Labels: fossils, igneous, maps, metamorphism, minerals, nova, plants, sediment

In my new work with the Campus Landscaping & Beautification Committee, I've been asked to come up with a few locations for a pet project of mine. I want to create a series of "fake" geologic outcrops on campus so we can have a "fake" geology field trip without leaving campus. The idea here is to create outcrops (using real rocks) in contrived positions, so that students get experience with figuring out things like rock identification, relative dating, transgressive/regressive sequences, faulting, etc.

I got this idea from Matty (2006), which I stumbled across while xeroxing science education articles for an MSSE class this past spring. The basic point is to have clear, useful teaching examples that students can access outdoors (emphasizing those kinesthetic and naturalist intelligences), without having to deal with the costs (legal, insurance, gas, carbon footprint) of a "real" field trip.

As a first step towards coming up with recommendations about where our initial "fake" outcrops will be placed, I asked our campus architect for a map of the campus. I told him I would prefer one with topography on it. Sure enough, he gave me one with topography... and a 1-foot contour interval! I don't think I've ever seen a topographic map with that level of detail. Anyhow, it's a beautiful thing, and I wanted to share it with you. I've labelled the buildings with their two-letter call numbers. (I teach in the CT building, for instance, but my office is in CF.*) Check it out:

Comments on the map? Or on what you think ought to be included in a "Campus Geological Area"? You know how to comment...

* I hate these two-letter names. They are so utilitarian... Why must we call the CG Building "the CG Building," rather than Godwin Hall? That would be much more elegant and academic-sounding.

----------------------------------
Reference:
Matty, David J. (2006). "Campus landscaping by constructing mock geologic outcrops." Journal of Geoscience Education, v.54, n.4, p. 445-451.

Labels: maps, msse, nova

A colleague mentioned this website to me yesterday: Voting America.

Maintained by the Digital Scholarship Lab at the University of Richmond (Virginia), the website makes us of so-called "cinematic maps" which show how geopolitical data have changed over time for the lower 48 United States.

The different maps tell stories over time; I think it's a cool display of interesting information. However, a major omission is the exclusion of Alaska and Hawaii as contributing U.S. states. Check it out; let me know what you think.

Thanks Judith G. for alerting me to it!

Labels: maps, politics, virginia, websites

I leave this weekend to begin a two-month trip out west (Montana mainly, but also Grand Canyon and points in between). As I'm prepping for the trip, my cat Lola has been sabotaging my efforts to plan. Though I've reassured her that she'll get along great with my subletter, she is still obsessed with blocking my trip-planning progress.

Here she is lying on the roadmap of Colorado:



And here, covering the "explanation" for a geologic map of the states of the stable interior:



I love that my job allows me summer travel time, and I love that, living in DC, I can get a subletter to take over my rent and cat care during the time I'm away. But I will miss this little furball when I'm on the road. She's a great cat.

Labels: lola, maps, travel

Where's the geographical center of the United States of America? This article in today's Times visits it, or something like it, in South Dakota.

Is geoblogging a phenomenon yet? It must be, if Geotimes writes a story about it.

And: Elizabeth Kolbert profiles Buckminster Fuller in the New Yorker.

Labels: blogs, maps

Here's a photo of one of the cool things that my Honors students and I got to see on our recent trip up to Buffalo, New York (for the northeastern section meeting of GSA ):

That's an original, signed edition of the William Smith geologic map, brought to the meeting courtesy of the Buffalo Library. It is one of only two in the United States; the other is at the Library of Congress. The map found a home in Buffalo (of all places!) thanks to Chauncey Hamlin, the head of the Buffalo Museum of Science (then called the Buffalo Society of Natural Science) from 1920 to 1948. During his tenure, he assembled a collection of first editions of many seminal scientific works. First editions of Charles Lyell's Principles of Geology and Herbert Hoover's* translation of Agricola's De Re Metallica were also on display at the conference.

* Yes, that Herbert Hoover, at least according to Wikipedia.

Labels: geology, history, maps, meetings, nova

What's the difference between these pictures?

... Find out at the NASA Earth Observatory feature page that examines "Cities at night: the view from space."

Labels: environmental, maps, satellite imagery

Here's a cool website that shows different maps of the world based on different data.

For instance, countries scaled to their population sizes:

Or here's the number of preventable deaths per country:

Build your own, or let me know if you find any other interesting ones...

Thanks to Anastassia for tipping me off on this one!

Labels: maps, websites

I've got a nice tough A.W.o.G.E. for you today. Hint: it's somewhere in the Virginia Piedmont. The presence of an airplane over the photographed site may help confirm the location, once you think you've found it.

In the comments section below, be the first to name the location and why the treeless area suffers so much sulfuric acid, and you will win a "GEOLOGY ROCKS" bumper sticker.

Labels: contest, google, maps, nova, piedmont

Take the next five minutes of your life, and watch this video about a cool new imaging experiment done by Kevin Gurney's research group at Purdue. They've taken pre-existing data about CO2 emissions and plotted it in a dynamic map. The most striking feature is the pulsating nature of the United States' CO2 emissions: we put out a lot during the day, and not so much at night. The maps really show this -- demonstrating yet again the power of images (over description) to convey information.

It's long been my contention that one of the biggest problems with the global warming issue is that CO2 is invisible. I'll bet that if people actually saw giant clouds the color of liquid Barney wafting off the coast every day, then they would be more inclined to think of carbon dioxide as something tangible.

Labels: art, climate change, CO2, global warming, maps

A friend alerted me to this cool blog that showcases weird maps. You gotta check it out. As a geological incentive to visit, here's one of the Mississippi River's shifting meanders through time:

If you don't have time to sift through all of them, a "best of" list of 21 maps is compiled here.

Labels: blogs, maps

A cool feature from Google Maps allows users to create individualized maps with content centered on specific locations. They call them "My Maps." This maps are then viewable in any HTML browser. Check out the "Earth As Art" demonstration map, or this "Oral Histories of Route 66" map for examples of the kind of stuff that you can do with "My Maps." You can also watch the video about how to create them.

It occurs to me that My Maps might be a good way to share geologic knowledge about outcrop locations. One thing that I found frustrating and limiting in my first few years of teaching was that there was no good single source to go to find out about relevant outcrops. It took time and experience to find out where the cool rocks were. Is it a good idea to put this information online in a publicly-accessible format so beginning instructors and interested students/amateurs can visit interesting outcrops? (I sure would have appreciated it four years ago!) Or does that run the risk of letting rockhounds and less-than-ethical geovandals onto previously-secret locations? Is there a benefit to the ancient barriers in outcrop-information flow? Is it better to pass this information on from wise elder to trusted neophyte?

Labels: google, maps, teaching, tech, websites

Starting today, DC police are monitoring live images from surveillance cameras in many parts of the city. The District has 73 cameras, with live feeds from 54. The Washington Post published this map showing where they are (supposedly the locations were chosen in historically high crime areas). They also have an article about the new system. My 'hood of Adams-Morgan gets two, it looks like...

Anyhow, I always love maps, so I thought I'd share this one.

Labels: dc, maps

Labels: google, maps