Strates & Volcans EarthCache

Les couches, dans la plupart des cas, sont associées à des roches sédimentaires car c'est à conséquence de la variation du processus de sédimentation dans le temps.
As they emerge from contact with the biosphere, sedimentary rocks often contain fossils. In addition, several groups of organisms actively participate in the formation of certain types of these rocks. The study of sedimentary rocks revealed fundamental aspects of the history of the Earth such as the distribution of continents and oceans in the past, climates of other geological eras, the emergence and extinction of biological groups and, more generally, biological evolution. This deduced knowledge is possible by applying the principle of actualism: this is the key to understanding the past. When we study and we understand current sediments, we transform the strata of sedimentary rocks in authentic book sheets that explain the geological history of the Earth.
 

Volcanism spawned fifty million years ago (Eocene) brought to the seabed the brightness of the water surface, which allowed, 36 million years ago, the development of coral reef, thereby increasing lime deposits on the submerged sedimentary platform of Anguilla called "Anguilla bench." These are the oldest soils, with hard limestone strata of Pointe Blanche type.
Later, in the early Neogene, about 23 million years ago, the geological formation of the island is complicated by the intrusion of a volcanic pushed through the "Anguilla bench." This is what gave the central framework of the hills now the highest. About 10 million years ago, to the late Miocene (middle of the former Tertiary), the island began to emerge from the ocean.