Asia china forest gibbon lar monkey primate rain forest Thailand tree zoo animal head horse Iran sky stone tehran bedrock boulder cobblestone crag crust earth gravel igneous lava lodge mass metal Mineral ore pebble promontory quarry reef rock horses mountain bird Radde's Accentor ancient arthropod cambrian eolith evolution extinct fossil impression marine neolith paleolith period petrifaction reconstruction relic skeleton specimen St trace trilobite