Pioneer Island is part of the Severnaya Zemlya group in the Russian Arctic. It measures in area. The island was discovered by Georgy Ushakov and Nikolay Urvantsev during their 1930-32 expedition.
This island contains the Pioneer Glacier.
Geological and biological data: &
Fossilized scales of thelodont Paralogania klubovi and a single scale of indeterminate Loganelliidae were found in the Llandovery deposits of the Silurian period, on Pioneer Island.