U. S. Highway 91 - B

U. S. Highways	U. S. Highway 91 (Continued)
	Tom Schweich

	For the most part US Highway 91 has been replaced by US Interstate 15. There are two segments of US Highway remaining. A northern segment follows a route abandoned by I-15 from just south of Pocatello, Idaho, through Logan, Utah, and then into the Great Salt Lake basin, where I-15 is rejoined. The southern segment of US Highway 91 heads west from Saint George, Utah then turns south to Littlefield, Arizona, bypassing the route that I-15 now takes through the Virgin River Canyon.
	The northern segment of US Highway 91 is found on the previous page The southern segment of US Highway 91 is below.
Other articles: • Interstate 15: in St George; Locations: Saint George.	St. George Junction: US Interstate 15, North to Salt Lake City, South to Las Vegas.
	Santa Clara
Literature Cited: - Retallack, Gregory J., 2009. Locations: Ivins.	The town of Ivins is just to the northeast of the highway. Just to the northeast of Ivins is a paleosol collection site in the Triassic to Jurassic Chinle, Moenave, and Kayenta formations used by Retallack in his 2009 study of greenhouse crises of the past 300 million years. Retallack used stomatal index data for fossil Ginko and related leaves as a proxy for past CO₂ spikes and paleosol chemical data as proxies for temperature and humidity changes. These data show that global warming due to CO₂ rise is a not a unique event in earth history and that the magnitude of the coming anthropogenic greenhouse pales in comparison with past greenhouse spikes at times of global mass extinctions.
	Shivwits
Other articles: • Gunlock Road: at Old US Hwy 91;	Junction: County Route 3184 "Gunlock Road"
Other articles: • Mojave Desert Joshua Tree Road: at US Hwy 91;	Junction: Junction: Mojave Desert Joshua Tree Road to area where Frasera albomarginata was found.
Other articles: • Beaver Dam Mountain Road: at old US Hwy 91;	Junction: Beaver Dam Mountain Road
	Utah Hill Summit
	CastleCliff
Other articles: • Mojave Desert Joshua Tree Road: at US Hwy 91;	Junction: Junction: Mojave Desert Joshua Tree Road
	Utah above … Arizona below …
Other articles: • Interstate 15: in Littlefield;	Littlefield Junction: US Interstate 15, north to St. George; south to Las Vegas.
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If you have a question or a comment you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.	[Home Page] [Site Map] Date and time this article was prepared: 12/9/2024 7:37:17 PM