Ostrov Strizhëva is a small islet located right off Belkovsky's southern shore.

Belkovsky Island consist of tightly folded Upper Devonian and Lower Carboniferous strata.

The Upper Devonian rocks are clayey marine carbonates interbedded with limestone, sandstone, and conglomerate.

The Lower Carboniferous rocks are composed of siltstone, argillite, and sandstone interbedded with breccia, limestone, and infrequent rhyolitic lavas.

It is tundra consisting mostly of very low-growing grasses, rushes, forbs, mosses, lichens, and liverworts.