Trinidad and Tobago Trinidad and Tobago Trinidad and Tobago (, ), officially the Republic of Trinidad and Tobago, is a twin island country that is the southernmost nation of the West Indies in the Caribbean. It is situated south of Grenada off the northern edge of the South American mainland, off the coast of northeastern Venezuela. It shares maritime boundaries with Barbados to the northeast, Grenada to the northwest, Guyana to the southeast, and Venezuela to the south and west. The island of Trinidad was a Spanish colony from the arrival of Christopher Columbus in 1498 until Spanish governor Don José María Chacón
Geology of Trinidad and Tobago the North Coast Schist, mafic plutonic rocks, the Tobago Volcanic Group and mafic dikes. Geology of Trinidad and Tobago The geology of Trinidad includes two different islands with different rock forms. The oldest rocks in Trinidad are low-grade metamorphosed phyllite, limestone and quartzite from the late Jurassic. Cretaceous quartzite, phyllite, shale and limestone outcrops around the Toco district. The east of the island is the only area with volcanic rocks exposed at the surface, including basalt, ash and breccia. Phyllite shale spans the north coast. Laventille Formation limestone is associated with these rocks and contains a gypsum layer. Flysch, dark