from Wiktionary, Creative Commons Attribution/Share-Alike License. 1  adj. Undisciplined, unruly; not able to be controlled. 2  adj. Lewd, immoral; sexually open, unchaste. 3  adj. Playful, sportive; being merry or carefree (often used figuratively). 4  adj. Self-indulgent, fond of excess; luxurious. 5  adj.
From the deepest ocean trench to the tallest mountain, plate tectonics explains the features and movement of Earth's surface in the present and the past. Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.The plates act like a hard and rigid shell compared to Earth's mantle.This strong outer layer is called the lithosphere.Developed from the 1950s through the 1970s, plate tectonics is the modern version of continental drift, a theory first proposed by scientist Alfred Wegener in 1912.he plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere. Developed from the 1950s through the 1970s, plate tectonics is the modern version of continental drift, a theory first proposed by scientist Alfred Wegener in 1912.
Earth's Crustal Plates. Introduction. Crustal plates form the outer layer of the Earth. There are seven major plates and many smaller plates. These tectonic plates are formed from the Earth's crust and uppermost part of the mantle.Types of tectonic plates. There are two types of tectonic plates.ceanic crust. Oceanic crust is constantly being formed at a mid ocean ridge. Molten rock from the mantle forms beneath spreading ridges where two crustal plates are separating. The lava erupts from vents forming pillow basalt as the plates move apart.