Eurasian Plate

ruptures primarily occur at the edges of the seven large plates

Earthquakes are an example of seismic activity created by plate boundaries. They can be caused by the subduction of oceanic crust which is densest at 2.9 g/cm3 under continental crust which weighs 2.7g/m3 at destructive plate boundaries. Earthquakes can also occur along conservative plate boundaries such as that shared by the Pacific and North American plates which move at 5-9 cm/year and 2-3 cm/year respectively causing the 1994 Los Angeles earthquake along the San Andreas fault alongside which

events are major pieces of evidence towards proving that plate tectonics theory is valid (40 marks) The theory of plate tectonics states that the Earth’s lithosphere (top layer of the Earth’s crust) is split up into rigid sections called plates that are moving relative to one another as they move on top of the underlying semi-molten mantle. These plates are either continental, The North American Plate, or oceanic, The Nazca Plate. Tectonic plates are powered by convection currents, which is the circular

Portuguese Azores archipelago (36°55’-39°45’ N, and 25°-31°15’W) comprises nine islands and several islets in the North Atlantic Ocean (Fig. 1). The islands are of volcanic origin, having arisen along sea-floor fracture zones as the Eurasian, African and North American tectonic plates rifted apart. The oldest rocks in the archipelago are found on the easternmost island, Santa Maria, and date to 8.12 million years ago (Azevedo and Ferreira, 2006). Owing to their volcanic origin, the islands of the Azores are

Question 1 The idea of Continental Drift to explain the current shape of Earths landmasses was first proposed by Abraham Ortelius in 1596. He proposed the idea to highlight the geometrical coincidences between America and Europe-Africa. In his work Thesaurus Geographicus he suggested that the Americas were “torn away from Europe and Africa…by earthquakes and floods”, and that “the vestiges of rupture reveal themselves, if someone brings forward a map of the world and considers carefully the coasts

Volcanoes exist all around the world. A volcano is where ash, gases, and molten rock from 30-120 feet underground erupts onto the surface. The ash, gases, and molten rock all stay in something inside a volcano called a magma chamber. The larger the eruption the more gas the magma has. The gases include water vapor, carbon dioxide, and sulfur dioxide. The two types of lava are aa (ah-ah) and pahoehoe. The types of volcanoes are shield, strato, silicic caldera complexes, monogenetic fields, mid-ocean

Introduction For this assignment, we are to examine earthquake activity around the world. Specifically, we are to examine the United States Geological Survey (USGS) earthquake website searching for earthquakes that have occurred around the world with a magnitude greater than two point five in the last seven days. Responses to the questions of the lab, based on the information obtained from the USGS website at 10:23 AM on Friday, January 3, 2014, are the basis of this paper. Greater Than Six Point

mainland Japan. These islands are situated in one of the most highly active volcanic regions of the world, part of the Pacific Ring of Fire, and formed by the subduction of the Pacific Plate and the Philippine Sea Plate boundaries. The islands themselves were formed by eruptions of lava due to undersea oceanic plate convergence over fifteen million years ago. Nishino-shima's coordinates lie at 27.247°N / 140.874°E, and is one of the youngest islands, believed to be only ten thousand years old, with

Running Head: Plate Tectonics Paper Plate Tectonics Paper University of Phoenix Plate Tectonics Paper Earthquakes, volcanoes, mountains and the Earth’s crust are unique yet have one common denominator; the amazing topic of plate tectonics. Plate tectonics has a place or specifically places a role in each of these natural wonders of the world. In the following, Team C will discuss the theory of plate tectonics and how the theory shaped the form and composition of the movement within

Tsunamis: the Geology Behind the Deadly Wave Tsunamis are damaging natural disasters that are universally feared. Nature can be one of the entities that terrifies humans the most. These disastrous tsunamis can be caused by many different situations. Geology is closely connected to the production of tsunamis and their occurrences. It is also a useful tool in identifying the causes of tsunamis in ancient times. All tsunamis are tied to rocks and minerals, which cause earthquakes. When the ocean floor