high-temperature shale oil
81Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …
82Early modern glass in England — The early modern period in England (c. 1500 1800) brought on a revival in local glass production. Medieval glass had been limited to the small scale production of forest glass for window glass and vessels, predominantly in the WealdKenyon, G.H.,… …
83heterocyclic compound — Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons,… …
84List of Transformers books — There have been many publishers of a book (some with accompanying audio cassettes) bearing the name Transformers based on the toy lines of the same name. Most common are Ballantine Books and Ladybird Books. Contents 1 Ballantine Books 1.1 Find… …
85Petrology — A volcanic sand grain seen under the microscope, with plane polarized light in the upper picture, and cross polarized light in the lower picture. Scale box is 0.25 mm. Petrology (from Greek: πέτρα, petra, rock; and λόγος, logos, knowledge) is the …
86Mojave, California — Mojave   census designated place   Halotrichite from the abandoned …
87Geography of Georgia (U.S. state) — The geography of Georgia describes a state in the Southeastern United States in North America. The Golden Isles of Georgia lie off the coast of the state. The main geographical features include mountains such as the Ridge and valley Appalachians… …
88Mudrock — Glacial Lake Missoula claystone Red mudrock in the Ragged Reef Formation ( …
89Anoxic event — As early as 1911, major oceanic currents were well mapped and understood, albeit without today s understanding of how they affect regional and global climatological conditions …
90Cambrian Period — Oldest time division of the Paleozoic Era. During the Cambrian, 543–490 million years ago, there were widespread seas and several scattered landmasses. The largest continent was Gondwana. The average climate was probably warmer than today, with… …
