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This is an accepted version of this page This is the latest accepted revision, reviewed on 30 January 2025. Classified advertisements website Craigslist Inc. Logo used since 1995 Screenshot of the main page on January 26, 2008 Type of business Private Type of site Classifieds, forums Available in English, French, German, Dutch, Spanish, Italian, Portuguese Founded 1995 ; 30 years ago (1995 ...
Thorium resources are the estimated mineral reserves of thorium on Earth. Thorium is a future potential source of low-carbon energy. [1] Thorium has been demonstrated to perform as a nuclear fuel in several reactor designs. [2] [3] It is present with a higher abundance than uranium in the crust of the earth. Thorium resources have not been ...
The spiny softshell turtle (Apalone spinifera) is a species of softshell turtle, one of the largest freshwater turtle species in North America. Both the common name, spiny softshell, and the specific name , spinifera (spine-bearing), refer to the spiny, cone-like projections on the leading edge of the carapace , which are not scutes (scales).
Monazite contains 2.5% thorium, allanite has 0.1 to 2% thorium and zircon can have up to 0.4% thorium. [2] Thorium-containing minerals occur on all continents. [3] [4] [5] Thorium is several times more abundant in Earth's crust than all isotopes of uranium combined and thorium-232 is several hundred times more abundant than uranium-235. [6]
The Texas spiny softshell turtle (Apalone spinifera emoryi) is a subspecies of the spiny softshell turtle in the family Trionychidae. The subspecies is native to the southwestern United States and adjacent northeastern Mexico .
The northern spiny softshell turtle (Apalone spinifera spinifera) is a subspecies of soft-shelled turtle in the family Trionychidae.The subspecies is native to the United States and can be found from Montana at the western edge of its range to Vermont and Quebec on the eastern edge.
The pallid spiny softshell turtle (Apalone spinifera pallida) is a subspecies of spiny softshell turtle native to the U.S. states of Arkansas, Oklahoma, Louisiana and Texas. [3] It was first described by Robert G. Webb in 1962.
The Guadalupe spiny softshell turtle (Apalone spinifera guadalupensis) is a subspecies of soft-shelled turtle native to the United States, in the state of Texas. [1] Their range is limited only to the Nueces and Guadalupe rivers, and their immediate tributaries .