how old are the oldest rocks on the ocean floor
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How would the age of the oldest rocks on the continents compare with the age of oldest rocks on the seafloor? Best Answer: The age of continental rocks are older than that of sea floor rocks. Ocean crusts form and deplete rapidly, and are generally quite young (180 million years or so for the oldest). Continental crusts generally are older (billions of years) because they deplete slowly, and mainly through erosion.
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How would the age of the oldest rocks on the continents compare with the age of oldest rocks on the seafloor? Report Abuse. The oldest rocks on the continents are much older than those on the sea floor. The oldest rocks on the continents are between 3.5-4.0 billion years old. Rocks of this age have been found in the centre of ancient continents-the Canadian Shield, Australia and Africa.
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The Earth's oldest rocks are found? Oldest Rocks On Earth. The oldest rocks are found in the cores of continents, and the youngest are in the rift valleys of mid-ocean ridges. they can be found at the tops of mountain ranges as well. some of the oldest rocks found on Earth can be found at the top of the Beartooth mountain range here in MT. Atlantic ocean.
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Where are the youngest rocks found in the seabed? Where are the oldest rocks found? Why? The youngest rock in the oceans is found at mid-ocean ridges, where they are formed continually - the oceanic crust. The oldest oceanic crust rocks in the oceans are found in the trenches. They are typically 200 million years old. The oldest one is 280 millions years, in the Mediterranean Sea. Why?
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How Old is the Earth So far, rocks older than 3.0 billion years have been found in North America, India, Russia, Greenland, Australia, and Africa. The oldest rocks in North America, found in Minnesota, give a U-Pb discordia age of 3.56 billion years (Figure 5). The oldest rocks yet found on the Earth are in Greenland, South Africa, and India. The Greenland samples have been especially well studied.
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Basic Geology/Lithosphere As a result, oceanic lithosphere is much younger than continental lithosphere: the oldest oceanic lithosphere is about 170 million years old, while parts of the continental lithosphere are billions of years old.
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How Old is the Earth In all cases, the measured ages provide only a minimum age for the Earth. So far, rocks older than 3.0 billion years have been found in North America, India, Russia, Greenland, Australia, and Africa. The oldest rocks in North America, found in Minnesota, give a U-Pb discordia age of 3.56 billion years (Figure 5). The oldest rocks yet found on the Earth are in Greenland, South Africa, and India. The Greenland samples have been especially well studied.
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Continental Drift and Seafloor Spreading Until only recently, geologists had thought that Earths surface hadnt changed much since the planet formed 4.6 billion years ago. They believed that the oceans and continents were always where they are now. But less than 100 years ago, a German scientist named Alfred Wegener took notice of some interesting findings. Similar plant and animal fossils were found in both Africa and South America and on other continents separated by oceans. Similar rock formations were also found on distant continents.
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High School Earth Science/Relative Ages of Rocks The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. 1  Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: 2  Layer C formed. 3  Layer B formed. 4  Layer A formed. 5  When layers A-B-C were present, intrusion D formed.
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The Earth The oldest Earth rocks are about 3.8 billion years old, although some small, very old grains found in sandstone have been dated at 4.1 billion years. The solar system is believed to be about 4.6 billion years old. Therefore, there is little evidence left on Earth about the very early solar system.
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The Age of the Earth 1 The oldest rocks on Earth, found in western Greenland, have been dated by four independent radiometric dating methods at 3.7-3.8 billion years. 2  Rocks 3.4-3.6 billion years in age have been found in southern Africa, western Australia, and the Great Lakes region of North America.dapted from The Age of the Earth, by the Branch of Isotope Geology, United States Geological Survey, Menlo Park, California.
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The Age of the Earth The oldest rocks which have been found so far (on the Earth) date to about 3.8 to 3.9 billion years ago (by several radiometric dating methods). Some of these rocks are sedimentary, and include minerals which are themselves as old as 4.1 to 4.2 billion years.ocks of this age are relatively rare, however rocks that are at least 3.5 billion years in age have been found on North America, Greenland, Australia, Africa, and Asia. While these values do not compute an age for the Earth, they do establish a lower limit (the Earth must be at least as old as any formation on it).
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History of Earth The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, soon after the formation of the Earth's crust and the Earth itself.
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What are the Earth's layers? Many rocks now making up Earth's crust formed less than 100 million (1×10) years ago; however, the oldest known mineral grains are 4.4 billion (4.4×10) years old, indicating that Earth has had a solid crust for at least that long.
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Where Are the Oldest Rocks on Earth Found? The oldest geological material ever found, which are not technically rocks, are mineral grains called zircons found in Western Australia, which date back about 4.36 billion years. Technically, the oldest known rocks existing on Earth are not from Earth at all, but are instead of extraterrestrial origin.he oldest rocks in the grand canyon are about 2 billion years old, but they are not even half the age of the oldest known rocks on earth. Credit: The National Park Service View full size image.
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Oldest dated rocks On September 25, 2008, researchers from McGill University, Carnegie Institution for Science and UQAM announced that a rock formation, the Nuvvuagittuq greenstone belt, exposed on the eastern shore of Hudson Bay in northern Quebec had a Sm-Nd model age for extraction from the mantle of 4.28 billion years.
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The Age of the Earth The oldest rocks on Earth, found in western Greenland, have been dated by four independent radiometric dating methods at 3.7-3.8 billion years. Rocks 3.4-3.6 billion years in age have been found in southern Africa, western Australia, and the Great Lakes region of North America.
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How would the age of the oldest rocks on the continents compare with the age of oldest rocks on the seafloor? Report Abuse. The oldest rocks on the continents are much older than those on the sea floor. The oldest rocks on the continents are between 3.5-4.0 billion years old. Rocks of this age have been found in the centre of ancient continents-the Canadian Shield, Australia and Africa.he oldest rocks on continental crusts are generally in the center of the continent, while the oldest rocks of ocean crust are generally farthest away from the ocean-ridges.
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How Did Life on Earth Get Started? On an arid outcropping of basalt in northwestern Australia, some of the oldest rocks on Earth lie exposed to the fierce sun. Formed at the bottom of an ancient ocean, this volcanic material shelters what one scientist calls the oldest robust evidence of life.
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Geology Unit 3 all oceanic crust on Earth is younger than about 200 million years. This is actually surprising given that the Earth was formed about 4,600 million years ago and there are areas of the continents where the rocks are known to be almost 4,000 million years old.
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Prehistoric life History of life on Earth Pangea supercontinent from space, as it may have looked 300 million years ago. The Earth is a little over 4.5 billion years old, its oldest materials being 4.3 billion-year-old zircon crystals. Its earliest times were geologically violent, and it suffered constant bombardment from meteorites.
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An Introduction to Plate Tectonics Additionally, the rocks composing the continental crust are very old, some formed as much as 3.8 billion years ago. For a long time we had no direct way to sample the rocks in the deep ocean and had very little knowledge about the nature of the ocean floor.
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How Old is the Earth Studies of the oldest rocks from the Precambrian shields show that the Earth is older than 3.8 billion years. The geology of these oldest rocks also indicates that there was a substantial period of history of the Earth before 3.8 billion years ago for which no datable geological record now exists.
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- The Guiana Highlands in South America are thought to be the earth's oldest surface (2 billion years old): it includes a large mountain plateau. Then there is the Medicine Mountain on Wyoming were they have dated rocks to 2-3 billion years ago.he oldest mountain range on earth is the Appalachia range, which  started forming 325 million years ago. Edit. Share to: 1  5 Things to Do on the Leeward Side of Oahu Oahu is the third largest of the Hawaiian Islands and the only island with an intercontinental airport.
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Anatomy of the Liver Bilirubin present in bile is a product of the liver’s digestion of worn out red blood cells. Kupffer cells in the liver catch and destroy old, worn out red blood cells and pass their components on to hepatocytes.
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Stromatolite Pictures Fossil stromatolites are the oldest known life forms on earth up to 3.5 billion years. Picture #: 071518. Image of a stromatolite, a limestone accretion formed by cyanobacteria, Hamelin Pool, Shark Bay, Western Australia, Indian Ocean; may be up to 1000 years old.