Here is a fossil seed fern of the genus Sphenopteris from the Carboniferous, of the Sophia-Jacoba coal mine. | |||
Location: | Sophia-Jacoba Coal Mine, 860 – 1000m deepth, Hückelhoven, Heinsberg, Germany | ||
Size of plate: | about 103 x 73 mm | ||
Age: | Upper Carboniferous, Namurian (About 316 Ma) |