Archive for July 14th, 2010

Yet another Wooster geologist in Utah

July 14th, 2010

LOGAN, UTAH–I’m here to spend a few days with my parents who are “summer citizens” on the Utah State University campus. Logan is in the far northeastern corner of Utah near Idaho.  Like all of the state, it has fascinating geology. Only California can match Utah for geological diversity and splendor. There is a reason why so many geologists find themselves coming back often to Utah.

This evening we walked to the eastern edge of the USU campus and looked at the Bear River Range a few kilometers away. It is a very complex packet of rocks, part of the Logan-Huntsville Allochthon (an allochthon is a set of Paleozoic rocks pushed out of place by tectonic activity). The East Cache Fault Zone separates the valley which contains Logan from the mountains.  Some geologists believe it represents the boundary between the Basin and Range Province to the west and the Middle Rocky Mountains Province to the east.  In the image below you can see that the zone is primarily a set of normal faults. In the Logan area it shows movement during the Holocene, and it is still active today.

Looking east at the Bear River Range from Logan, Utah. The East Cache Fault Zone is in the foreground. Note the faceted spurs on the flanks of the mountains.

Tomorrow we explore Logan Canyon, which cuts perpendicularly through the Bear River Range, and look at the exposed carbonate rocks in detail. I can smell the fossils from here.

The Golden Circle Tour

July 14th, 2010

Guest Blogger: Becky Alcorn

Today we took the Golden Circle tour in Iceland. I think I saw more amazing geologic sites on this one tour than I’ve ever seen before. Our tour began at Thingvellir in the rift valley where we hiked along the Mid-Atlantic Ridge and spent a good deal of time trying to calculate the spreading rate. We then drove to Geysir where I saw my first geyser! (and enjoyed the wonderful smell of sulfur). I also got to enjoy my first taste of hamburger sauce at the visitor center there. Our tour ended with a stop at Gullfoss, an incredible waterfall with only a small rope in some places to prevent you from falling in (take your kids at your own risk, I guess).

A panoramic view of Thingvellir

Standing on the edge at Thingvellir

The original Geysir

Strokkur geyser at Geysir

The Gullfoss (Golden Waterfall)

As you can see you can get as close to the water at Gullfoss as you'd like