Eastern Mojave Vegetation Teton Park Road  

Tom Schweich  

Home Page  Interior scenic road.

Other articles: U. S. Hwy 89 at Teton Prk Rd  

Junction: US Highway 89 (191)


Other articles: Signal Mountain Road at Teton Prk Rd  

Junction: Signal Mountain Road

Other articles: Field Notes at Mt Moran ST

Locations: Mount Moran Scenic Turnout.
Full Size ImageInterpretive panel for Mount Moran.  

Mount Moran Scenic Turnout

Full Size Image
Mount Moran
Full Size Image
Mount Moran

Mount Moran

Mount Moran reflects all the geologic forces shaping the Teton Range. Formed of a massive block of metamorphic gneiss; cut by dikes of igneous granite and diabase; capped by sedimentary sandstone; and flanked by glaciers, this formidible peak dominates the park's northern skyline.
The gneiss and granite are among the oldest rocks in North America, 2.7 and 2.5 billion years old respectively. These resistant rocks form the core of the Teton Range. The vertical “Black Dike” of 775 million year old diabse is about 150 feet wide and jut from the mountain's face because the surrounding gneiss has eroded away.
Five glaciers — Falling Ice, Skillet and Triple — flank Mount MOran. These glaciers formed during a cool period called the Little Ica Age that ended around 1850 AD. Over the past 40 years, the park's glaciers have shrunk by more than 20 percent due to our changing climate.
Tan sandstone caps the summit of this massive peak the remnant of a 510 million year-old beach that stretched for hundreds of miles north and south of here. Sandstone overlies the Black Dike and other ancient igneous and metamorphic rocks.

Other articles: Field Notes 4 Sept 2019

Locations: Glacier Gulch Turnout.
Full Size ImageMiddle Teton, with basaltic dike.  

Glacier Gulch Turnout

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Middle Teton, with basaltic dike.


Other articles: Field Notes at visitor center US Hwy 26 at scenic view
Full Size ImageGrand Teton (peak)  

Craig Thomas Discovery and Visitor Center

  Cross Snake River


Other articles: US Hwy 26 at Teton Pk Rd  

Junction: US Highway 26 (89, 191)


If you have a question or a comment you may write to me at: tas4@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.  

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Date and time this article was prepared: 3/31/2020 1:49:43 PM