fusinite
/ˌfjuːsɪˈnaɪt, -ˌnɪt/Definitions
1. noun
A type of fossilized charcoal, often found in coal deposits.
“The geologist studied the fusinite layers to better understand the area’s geological history.”
2. adjective
Relating to or resembling fusinite.
“The fusinite-rich sediment provided valuable information about the region’s coal deposits.”