spherule

This structure is called a spherule.

The black object within looked like . . . The spherule vanished again.

"If you find so much as a pre-biotic spherule, a pseudo-membranous configuration, even a viroid aggregate, the show's off.

The diagnosis of coccidioidomycosis is confirmed by culture of the organism from clinical specimens or by demonstration of the typical spherule on histopathologic examination of involved tissue.

Volcanic ash beds (tonsteins and bentonite beds) and impact spherule beds, and specific mega turbidites are types of key beds created by instantaneous events.

The two-inch layer at Bass River is the thickest spherule deposit of that geological period found north of the Gulf of Mexico, and the first discovered in New Jersey.

It looked even more like the Venus symbol, a spherule of carbon with a long piece sticking out of it, with a crosspiece at the end tipped with what looked like hairs.

Several researchers have criticized the conclusions for incorrect aging of the sediments, an inconsistent hypothesis that made it difficult to predict the type and size of bolide, lack of proper identification of lonsdaleite, confusing an extraterrestrial impact with other causes such as fire, and for inconsistent use of the carbon spherule "proxy".