• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
AP World History Fall 2014-15 Joela Basse Room 205 Joela.Basse
AP World History Fall 2014-15 Joela Basse Room 205 Joela.Basse

... Welcome to AP World History for the 2014-15 school year. If you haven’t realized it yet, you will be doing an astonishing amount of work in preparation for the May 2015 AP World History Exam. This begins NOW. That is, your first semester reading begins your quest for a “5” on the AP World Exam!!! We ...
6/page
6/page

... the ocean floor -creation of ocean crust at mid-ocean ridges Subduction of ocean crust at oceanic trenches The oceanic crust is a thin layer on top of a convecting mantle Continents as rafts of lighter material -‘bump’ into each other, forming compressional mountain ranges and adding new material to ...
here - Zandrivier farm
here - Zandrivier farm

... how did marine shell fossils end up in its rocks. To answer that, we have to go back 510 million years. That was when deposition of sediments of the Cape Supergroup began. At the time the area which is now Zandrivier lay in a shallow southern ocean called the Agulhas Sea, the coast of southern Afric ...
North America – Physical Features - bms-geo6
North America – Physical Features - bms-geo6

...  The Northern part near the Hudson Bay is known as the Canadian Shield. It is made up of some of the oldest rocks in the world, like the Plateau of Africa and the Deccan Plateau of India.  The Canadian Shield was covered with thick sheets of ice during the Ice Age about 18,000 years ago. Glaciers ...
plate tectonics 2009..
plate tectonics 2009..

... II. The Theory of Plate Tectonics  Plate movement – the rules  1. Continental crust does not sink due to its relatively low density  2. Continental plates may consist of both continental and ocean crust, e.g. Eurasian Plate  3. Plates do not overlap  4. No ‘gap’ may occur on the earth’s surfac ...
chapter4 - West Broward High School
chapter4 - West Broward High School

... the processes of erosion and deposition. The ocean floor can be divided into two regions: continental margins and deep-ocean basins. The continental margin, the relatively shallow ocean floor nearest the shore, consists of the continental shelf and the continental slope. The continental margin share ...
Presentation
Presentation

... For Earth to be cold and dry, atmospheric CO2 must have been much lower, but it is unclear what would cause low concentrations. Some climate changes have been very rapid. Extinctions caused by them appear to be “instantaneous” in the fossil record. ...
1. Description of Atlantis, the sunken continent
1. Description of Atlantis, the sunken continent

... According to Plato, Atlantis disappeared under the waters of the ocean within a single day. Is it possible for a continent to sink 4 km below sea level in one day? There are probably only two possibilities – either an impact by a huge comet or asteroid, or continental drift resulting in a sudden mov ...
Earths History Presentation
Earths History Presentation

... • There are 4 major divisions: – Precambrian – represents the first 85% of Earth’s history (mostly devoid of fossils). – Paleozoic Era – represents ~ 8.5% of Earth’s history (invertebrates, fishes, amphibians, vertebrates and land plants first appear). – Mesozoic Era – rep. ~ 3.5% of Earth’s history ...
The Theory of Seafloor Spreading
The Theory of Seafloor Spreading

... the iron particles in it magnetize differently proving that new seafloor was created at different times in our history. ...
Seafloor Spreading Lab with Makeup
Seafloor Spreading Lab with Makeup

... Background: In the last few decades, scientists have discovered both age and magnetic patterns in the seafloor, which are evidence for plate tectonics. These patterns show that new seafloor has been forming for millions of years at mid-ocean ridges throughout the oceans. Magma melted within the crus ...
Geologic Time
Geologic Time

... fossils and radioactive dating methods, geologists have developed the geologic time scale to chronicle the documented events of earth history (• Figure 2.25}. Note that the scale is divided into units of time during which rocks were deposited, li fe evolved, and significant geologic events such as m ...
Geological processes in the British Isles
Geological processes in the British Isles

... series of major tectonic structures that can be observed on the Ten Mile Map. At a later date, the Variscan Orogenic Belt (which is found in the southern British Isles) formed as a result of another period of continental collision, when the Rheic Ocean closed between Laurentia and Gondwana (Figure 3 ...
Unit One Notes
Unit One Notes

... - Plate tectonics is the theory that the earth was once a giant supercontinent called Pangea. Over time, the supercontinent broke apart and large pieces of land sitting on plates (large pieces of slow moving rock) began to move away from each other. - As plates move apart or come back together, they ...
Powerpoint Presentation Physical Geology, 10/e
Powerpoint Presentation Physical Geology, 10/e

... • Basic idea of plate tectonics Earth’s surface is composed of a few large, thick plates that move slowly and change in size • Intense geologic activity is concentrated at plate boundaries, where plates move away, toward, or past each other • Combination of continental drift and seafloor spreading h ...
CHAPTER 3CPLATE TECTONICS
CHAPTER 3CPLATE TECTONICS

... 2. The theory of continental drift was initially rejected by many American scientists because a. there was overwhelming evidence against it. b. few scientists believed it possible for the continents to move over a solid earth. c. the earth was considered to be too young for the continents to have mo ...
Chapter 12 Next Generation Sunshine State Standards
Chapter 12 Next Generation Sunshine State Standards

... FIGURE 12.2 Climbers near the top of Mount Everest. At this altitude the level of oxygen is only one-third the amount available at sea level. (Photo courtesy of Woodfin Camp and Associates) ...
History of Ocean Basins
History of Ocean Basins

... For purposes of discussion certain simplifying assumptions are made as to initial conditions on the Earth soon after its formation. I t is ostulated that it had little in the way of an atmosphere or oceans and that t e constituents for these were derived by leakage from the interior of the Earth i n ...
Chapter 1
Chapter 1

... To make both full and wise use of the sea’s living resources To solve the problems marine organisms create Predict the effects of human activities on the life of the sea Marine organisms provide clues to earth’s past and the history of life and our own bodies ...
Chapter 1
Chapter 1

... To make both full and wise use of the sea’s living resources To solve the problems marine organisms create Predict the effects of human activities on the life of the sea Marine organisms provide clues to earth’s past and the history of life and our own bodies ...
Science Voyaging
Science Voyaging

... – SEASAT: 1st satellite dedicated to ocean studies ...
Ocean Regions Day 2
Ocean Regions Day 2

... Key Points • The three major regions of the ocean floor are the continental margins, the ocean basin floor and the mid-ocean ridges. • The gently sloping submerged surface extending from the shoreline toward the deep ocean is called the continental shelf. • At the continental margin in the Pacific ...
Question: Equal volumes of the four samples (iron
Question: Equal volumes of the four samples (iron

... CRETACEOUS, TERTIARY, PLEISTOCENE (Epoch) weakly consolidated to unconsolidated gravels, sands, and clays LATE TRIASSIC and EARLY JURASSIC conglomerates, red sandstones, red shales, and diabase (in Palisades Sill) ...
Untitled
Untitled

... 66. The term _______covers all the process in which molten rock material rises to the crust. A) Earthquake B) Isostacy C) Volcanicity D) Diastrophism 67. There is a close relationship between plate margins and ______. A) Volcanicity B) Earthquake C) Isostacy D) Diastrophism 68. Vally of ten thousand ...
Forward Modelling in the Geosciences
Forward Modelling in the Geosciences

... (after 65 million years ago), Australia appears to have subsided as a single unit by as much as 200 m, perhaps with very little tilting, as the continent moved northward after it separated from Antarctica. Where plates diverge, seafloor spreading occurs, forming new ocean crust. The process of subdu ...
< 1 ... 45 46 47 48 49 50 51 52 53 ... 115 >

Geological history of Earth



The geological history of Earth follows the major events in Earth's past based on the geologic time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy). Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System.Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as the result of a Mars-sized object with about 10% of the Earth's mass impacting the planet in a glancing blow. Some of this object's mass merged with the Earth, significantly altering its internal composition, and a portion was ejected into space. Some of the material survived to form an orbiting moon. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor, augmented by ice delivered from comets, produced the oceans.As the surface continually reshaped itself over hundreds of millions of years, continents formed and broke apart. They migrated across the surface, occasionally combining to form a supercontinent. Roughly 750 million years ago, the earliest-known supercontinent Rodinia, began to break apart. The continents later recombined to form Pannotia, 600 to 540 million years ago, then finally Pangaea, which broke apart 180 million years ago.The present pattern of ice ages began about 40 million years ago, then intensified at the end of the Pliocene. The polar regions have since undergone repeated cycles of glaciation and thaw, repeating every 40,000–100,000 years. The last glacial period of the current ice age ended about 10,000 years ago.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report