soil strata
61Aberdeenshire (historic) — County of Aberdeen Aberdeenshire within Scotland in 1890 Geography Status County (until 1975) …
62Lacandon Jungle — Some of the photos of Trudy Blom, who photographed much of the Lacandon Jungle and its people in the 20th century The Lacandon Jungle (Spanish: Selva Lacandona) is an area of rainforest which stretches from Chiapas, Mexico into Guatemala and into …
63Cedar Mountain Formation — Stratigraphic range: Late Cretaceous Type Geological formation Location Region North America The Cedar Mountain Formation is the name given to distinctive sedimentary rocks in eastern Utah that occur between the underlying …
64Carboniferous Period — Interval of geologic time 354–290 million years ago, marked by great changes in world geography. All the landmasses drew closer together as a result of tectonic plate movements. The supercontinent Gondwana occupied much of the Southern Hemisphere …
65community ecology — Introduction study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat. As populations of species interact with one …
66Egypt — • Provides information on history, religion, and literature Catholic Encyclopedia. Kevin Knight. 2006. Egypt Egypt † …
67Stratigraphy — Stratigraphy, a branch of geology, studies rock layers and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy includes two related subfields: lithologic or lithostratigraphy and… …
68Coal mining — Men leaving a UK colliery at the close of a shift Surface coal mining in Wyo …
69Dumfriesshire — Not to be confused with Dumfriesshire (Scottish Parliament constituency) or Dumfriesshire (UK Parliament constituency). Dumfries   County (until circa 1890)   …
70Tunnel boring machine — A tunnel boring machine that was used at Yucca Mountain nuclear waste repository A tunnel boring machine (TBM) also known as a mole , is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.… …
