Tank Rock Introduction
Tank Rock is a remarkable rock formation located by the coral reef coast, resembling a tank, covered in green algae. The rock features large holes that visitors may be lucky enough to see local cows and sheep passing through, creating a stunning view. The geological structure of Orchid Island consists mainly of andesitic lava and basalt clastic rocks containing hornblende, along with Pleistocene red soil layers, uplifted coral reefs, and Holocene alluvial and colluvial layers, all sculpted by the natural processes of coastal erosion and weathering, resulting in Orchid Island's most fascinating rock formations. In addition to Tank Rock, other famous rock formations on Orchid Island include Red Head Rock, Crocodile Rock, Twin Lions Rock, Dragon Head Rock, Old Man Rock, Elephant Nose Rock, Hen Rock, Five-Opening Cave, Jade Girl Rock, Steel Helmet Rock, Battleship Rock, and Steamed Bun Rock.