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.
42.
For instance, in 1922, No?was contacted by David White, who strongly believed that coal balls could not be found in North America.
43.
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.
44.
Chitaley also developed a technique of preserving fossilized material in coal balls using wax, which came to be known as the " Chitaley technique ".
45.
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.
46.
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.
47.
A "'coal ball "'is a type of concretion, varying in shape from an imperfect sphere to a flat-lying, irregular slab.
48.
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.
49.
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.
50.
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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