Factory Butte, Wayne County, Utah
Photographer: Stevie Emerson; © 2012
The Muley Canyon Sandstone Member of the Cretaceous-age Mancos Shale forms a protective cap at the top of Factory Butte, allowing it to tower 1,500 feet above badlands of the easily erodible Blue Gate Shale Member. These rocks record the existence of an inland sea covering much of Utah around 90 million years ago.
It’s Thursday, and that means “Spot the Rock”!
Can any of you geo-sleuths tell us where this is?
The 1964 Great Alaska Earthquake happened 50 years ago today. It was the largest quake in U.S. history. Watch this interesting video by the U.S. Geological Survey.
mnn.com
I the massive supervolcano underneath Yellowstone National Park ever erupted, it could spew ash over most of the United States. Of course, the Yellowstone Caldera (as it is formally known) hasn’t erupted in about 70,000 years — and it only seems to erupt around every 700,000 years — so it seems unlikely that it will happen again anytime soon. All the same, researchers constantly study the underground volcano looking to understand its behavior. You know, just in case.
House Range, Juab and Millard Counties, Utah
Photographer: Jim Davis; © 2012
Swasey Mountain and the House Range, Juab and Millard Counties.
sltrib.com
With geologic hazards along State Road 9 clearly mapped in a new report and a population expanding sixfold in the corridor by 2035, community leaders face tough decisions about development in their scenic, but often dangerous, landscape.
Thomas Range, Juab County, Utah
Photographer: Jim Davis; © 2012
Layered volcanic rocks of the Topaz Mountain Rhyolite weather into interesting shapes. The rocks, referred to as stratified tuff, formed as ash fell from the sky and flowed across the ground during the explosive eruption of a volcanic caldera around 7 million years ago.
usgs.gov
Newly released US Topo maps for Utah now feature a new commercial road data provider. The latest highway, road and street data from HERE has been added to the 1,476 revised US Topo quadrangles for the state.
my.news.yahoo.com
Not only did John Wesley Powell row down the Colorado River through the Grand Canyon, he did it with only one arm. Before that, he had already fought through a war, walked across Wisconsin and rowed down the Mississippi, the Ohio and the Illinois Rivers. Later in his life, he would direct the US Geological Survey and the Bureau of Ethnology at the Smithsonian Institution. But it was his quest to research the American West that really made him famous as one of America’s most intrepid travelers.
huffingtonpost.com
Continents grow like onions, with rings of younger rocks added layer by layer to the perimeter of an ancient landmass. But even though scientists know where continents get bigger, plate tectonic models have never fully explained the how.
The Utah Geological Survey (UGS) is a division of the Utah Department of Natural Resources. Several specialized programs comprise the UGS: Data Management, Energy & Minerals, Geologic Hazards, Geologic Information & Outreach, Geologic Mapping, Groundwater & Wetlands, and Paleontology.
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