gravel deposit
61Big Eddy Site — The Big Eddy Site (23CE426) is an archaeological site located in the southwestern portion of the U.S. state of Missouri, which was first excavated in 1997 and is now threatened due to erosion from the Sac River. Location and General… …
62HISTORICAL SURVEY: THE STATE AND ITS ANTECEDENTS (1880–2006) — Introduction It took the new Jewish nation about 70 years to emerge as the State of Israel. The immediate stimulus that initiated the modern return to Zion was the disappointment, in the last quarter of the 19th century, of the expectation that… …
63River delta — Nile River delta, as seen from Earth orbit. The Nile is an example of a wave dominated delta that has the classic Greek delta (Δ) shape after which river deltas were named. A delta is a landform that is formed at the mouth of a river where that… …
64London — /lun deuhn/, n. 1. Jack, 1876 1916, U.S. short story writer and novelist. 2. a metropolis in SE England, on the Thames: capital of the United Kingdom. 3. City of, an old city in the central part of the former county of London: the ancient nucleus …
65Mining engineering — Surface coal mine with haul truck in foreground Mining engineering is an engineering discipline that involves the practice, the theory, the science, the technology, and application of extracting and processing minerals from a naturally occurring… …
66Diatomaceous earth — A sample of diatomaceous earth Diatomaceous earth (  / …
67Glass recycling — Public glass waste collection point in a neighborhood area for separating colorless, green and amber glass …
68Prehistoric Norfolk — This prehistory of the County of Norfolk, England is broken into specific time periods. Norfolk has a very rich prehistoric past, from the Palaeolithic 750,000 years ago, to end of the Iron Age 2000 years age. Indeed, Norfolk has the earliest… …
69Gold mining in Alaska — Gold mining in Alaska, a state of the United States, has been a major industry and impetus for exploration and settlement since a few years after the United States acquired the territory from Russia. Russian explorers discovered placer gold in… …
70Oil sands — The Athabasca oil sands in Alberta, Canada, are a very large source of bitumen, which can be upgraded to synthetic crude oil. Bituminous sands, colloquially known as oil sands or tar sands, are a type of unconventional petroleum deposit. The… …
