coal ball वाक्य
उदाहरण वाक्य
मोबाइल
- Rather, it asserts that the material that would become a coal ball was transported from another location by means of a flood or a storm.
- For instance, in 1922, No?was contacted by David White, who strongly believed that coal balls could not be found in North America.
- No?later managed to convince him otherwise by showing him a wheelbarrow full of Illinois coal balls, after which White never spoke to No?again.
- Chitaley also developed a technique of preserving fossilized material in coal balls using wax, which came to be known as the " Chitaley technique ".
- No?s work renewed interest in coal balls, and by the 1930s had drawn paleobotanists from Europe to the Illinois Basin in search of them.
- The majority of coal balls are found in bituminous and anthracite coal seams, in locations where the peat was not compressed sufficiently to render the material into coal.
- A "'coal ball "'is a type of concretion, varying in shape from an imperfect sphere to a flat-lying, irregular slab.
- As such, despite not actually being made of coal, the coal ball owes its name to its similar origins as well as its similar shape with actual coal.
- Although coal balls are usually about the size of a man's fist, their sizes vary greatly, ranging from that of a walnut up to in diameter.
- Shya Chitaley addressed this problem by revising the liquid-peel technique to separate the organic material preserved by the coal ball from the inorganic minerals, including iron sulfide.
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