Search results
Results from the WOW.Com Content Network
Construction equipment being used to dig up rocky ground. Although humans are capable of digging in sand and soil using their bare hands, digging is often more easily accomplished with tools. The most basic tool for digging is the shovel. [1] In neolithic times and earlier, a large animal's scapula (shoulder blade) was often used as a crude ...
An excavation site or "dig" is the area being studied. These locations range from one to several areas at a time during a project and can be conducted over a few weeks to several years. Excavation involves the recovery of several types of data from a site.
Petroleum is a fossil fuel that can be drawn from beneath the Earth's surface. Reservoirs of petroleum are formed through the mixture of plants, algae, and sediments in shallow seas under high pressure.
The process to analyzing phytoliths includes several, well-standardized steps: [49] Organic matter must be removed. This is typically accomplished by heating hydrogen peroxide to 70 degrees Celsius. Hydrogen peroxide is known to effectively remove organic matter without damaging the phytoliths below.
The anaerobic process is very slow, taking more than three times the normal mesophilic time process. [33] In experimental work at University of Alaska Fairbanks , a 1,000-litre digester using psychrophiles harvested from "mud from a frozen lake in Alaska" has produced 200–300 litres of methane per day, about 20 to 30% of the output from ...
Dec. 26—MORGANTOWN — The Morgantown Utility Board intends to employ a rapidly emerging technology to address old clay lines along Listravia Avenue. General Manager Mike McNulty explained ...
Drawbacks to hand-dug wells are numerous. It can be impractical to hand dig wells in areas where hard rock is present, and they can be time-consuming to dig and line even in favourable areas. Because they exploit shallow aquifers, the well may be susceptible to yield fluctuations and possible contamination from surface water, including sewage.
The unusual demand for FBI employees to explain their role in an investigation comes as CNN has reported that President Donald Trump’s Justice Department is considering expanding its purge of ...