Archean PowerPoint PPT Presentations

THE BEDROCK OF QUEBEC: GEOLOGICAL PROVINCES BORN FROM ANCIENT CONTINENTS. LE SOUS-SOL DU QUEBEC: DES PROVINCES GEOLOGIQUES NEES D'ANCIENS CONTINENTS ...

Plate Tectonics in the Archean On Archean granites, greenstones, cratons and tectonics: does the evidence demand a verdict? M. J. de Wit (1998)

Archean cratons

1) What is the source for high levels of greenhouse gases in Earth's earliest atmosphere? ... Oxidize rapidly in atmosphere. Are biologically utilized. H2O ...

In the North Caribou terrane evidence of graben development exists in the ... Caribou terrane (in several greenstone belts along a 2000 km long continental ...

The Archean: 4.6-2.5bya 1-the formation of the Earth (the last stage of the formation of the solar system and the Big Bang 2- the evolution of the atmosphere and ...

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The oldest known rocks on Earth are 3.96 billion years old. Precambrian ... approximately 4 billion years old ... 3.3- to 3.5-billion-year-old Warrawoona Group ...

Chapter 8 Precambrian Earth and Life History The Archean Eon ...

Most granite plutons are batholiths, which form deep in the core of mountain ranges. ... Vermillion Complex, Including Giants Range Batholith 2.67 Ga ...

Title: No Slide Title Author: GRAEME WALLACE Last modified by: Earth & Planetary Sciences Created Date: 1/10/2001 10:09:44 AM Document presentation format

Obtain information on the combined evolution of Baltic-Greenland in the Archaean. Archaean alkaline complexes are rare worldwide and in Greenland and the Baltic ...

Chapter 8 Precambrian Earth and Life History The Hadean and Archean

Keywords: Archean eon (4.6-2.5 billion years ago), nebula, planets, meteorites, comets, differentiation, oceanic crust, continental crust, plate tectonics, ...

In this ancient period of Earth history, called Archean period, the atmosphere ... Tiny Particles A sunrise over the China Sea Aerosol Types Why are ...

The Archean Earth was hotter (from impacts and more radioactive decay). A more vigorous mantle ... Acasta gneiss, in Nunavut: a metamorphosed granite. ...

... be seen in places escaping' from the rock) leaving a granulite residue ... Alternative Model for Archean Boninites and Related Rocks. Arculus et al. (1992) ...

Archaean magmatism NB- Archean (US spelling) or Archaean (UK spelling) Why? Somehow different from modern magmas Interesting to test our understanding of petrogenetic ...

30.2 THE PRECAMBRIAN AND PALEOZOIC PRECAMBRIAN TIME Not an official part of the geologic time scale, more a reference for the Archean (~3.9 bya-2bya) and Proterozoic ...

between roughly -50 and 60 C. THE PRIMORDIAL EARTH. Hadean and Archean Eons ... Singular = Mare, plural= Maria. Large, dark areas. Covered with basaltic lava flows ...

... The Archean atmosphere is ... .edu/lecturers/gould/gifs/burg.jpg 5. http://www-tc.pbs.org/wgbh/nova/link/images/hist_img_01_prec.jpg http://www.geology.wisc.edu ...

Late Cenozoic Geology Neogene Period/Pleistocene Epoch ... Ordovician (North Africa) Ediacarian (700 mybp)-Snowball Earth?? Late Archean/Early Proterozoic (2 ...

THE PRIMORDIAL EARTH Hadean and Archean Eons Evidence of Anoxia Lack of oxidized iron in the oldest sedimentary rocks. Urananite and pyrite are readily oxidized today ...

The 3.5 billion years old Archean cells preserved in chert, and ... horseshoe crab. scorpion. The phylum Arthropoda, today, includes insects, spiders, crabs...

Archean Proterozoic Hadean Many Igneous rocks are Precambrian Granites. The metamorphic rocks exposed Along this route consist of Precambrian schist and gneiss ...

... plates formed volcanic arcs by subduction Archean Plate Tectonics Plate tectonic activity has ... especially in Zimbabwe These ore deposits are found in ...

Geology for Life Sciences ... amino acids, nitrogen base derivatives Archean Eon Atmosphere still reducing in character Formation of persistent crustal features ...

... Mountains, MT. Looking down glaciated valleys from above. Beartooth Mountains, MT. View of Archean gneiss. Beartooth Mountains, MT. Discussion of alpine ecology ...

Proterozoic rocks are generally less meta-morphosed than Archean rocks. ... of smaller plates with craton leaving linear or arcuate deformation belts. ...

The PreCambrian era spans 4 bllion years, scontaining the Archean and Proterozoic eons ... Originated in Archeon Eon. Were prokaryotic heterotrophs ...

The many life forms of the Precambrian era were not complex and they ... The first one is Hadean time, then Archean era, and finally Proterozoic era. Plants ...

The Proterozoic Eon and the Early Paleozoic

Formation of the Solar System. The Solar Nebula Hypothesis ... Formation of the Solar System. The Solar Nebula Hypothesis. 90% of mass to center. ...

Last April, a 5th grader pointed out to the Smithsonian Natural History Museum ... the depths of the planet, tore the thin crust, and then cooled off on the ...

Why do we have an atmosphere today? Magnetic field deflects solar wind. Atmosphere ... Chimney. Tube worms found near black smokers. Life at the black smokers ...

Trans-Hudson Orogen. Includes a sedimentary record of: ... Trans-Hudson Orogen. THE LESS-PRIMORDIAL EARTH. The Paleoproterozoic Era. Paleoproterozoic Ice Age ...

One of the first things to contemplate when considering any granite surface is why people choose it. There are many reasons people select natural granite for kitchen countertops. Tan Brown Granite has many of the benefits that virtually all natural granite offers. It does however, have some characteristics that make it what it is.

A GIS Mineral Occurrence Database in Support of a Metallogenic Study of the Slave Province

Title: PreCambrian Author: Charles L. Smart Last modified by: Chuck Created Date: 11/19/2004 1:04:05 PM Document presentation format: On-screen Show (4:3)

... grew more rapidly along their margins a process called continental accretion as plates collided with island arcs and other plates Also, ...

... the oldest known complete ophiolite providing evidence for an ancient convergent plate boundary is the Jormua complex in Finland It is about 1.96 billion ...

Fig. 1: General outline map of the Wyoming Province and its ... Geology of the Stillwater County sector of the J-M reef, including the Minneapolis adit. ...

Geology 103 Evolution of the atmosphere Hadean: Lots of carbon dioxide, ... plate tectonics settles down What does a greenstone belt remind you of?

Title: PowerPoint Presentation Author: McDougal Littell Last modified by: LocalAdmin Created Date: 9/14/2006 4:17:10 PM Document presentation format

... Waterless Early Earth Shortly after accretion, Earth ... continents grew more rapidly along their margins a process called continental accretion as plates ...

EarthScope: Revealing Earth's Secrets

Island Arcs and other terranes accrete as. intervening ocean crust is subducted ... Shark Bay Australia. Formed in hypersaline areas where grazing gastropods ...

Title: Chapter 22 Subject: Earth Science Author: Glencoe/McGraw-Hill Last modified by: Howells Public School Created Date: 3/26/2004 3:29:16 PM Document presentation ...

P-T-t Paths and Their Significance Metamorphic Field Gradient Trend of Thermal Maxima Across Metamorphic Facies Clockwise P-T-t Path P-T-t Path Reflecting Crustal ...

Island Arcs and other terranes accrete as. intervening ocean crust is subducted ... Shark Bay Australia. Formed in hypersaline areas where grazing gastropods ...

Sci. 3-5 Times Marches On Pages 73-77 The history of the Earth is recorded in rock layers 1) Earth is about 4.6 billion years old. The geologic time scale- a scale ...

in Glacier National Park, Montana. The angular peaks, ridges and broad ... in large alluvial fans. that grade into sandstone and shale. with increasing distance ...

Thermal structure of continental lithosphere from heat flow and seismic ... Trans-Hudson Orogen. 1.2 0.1. Superior Province. 2.1 0.5. Slave Province. Province DI ...

Cenozoic Laurasia became North America and Eurasia Gondwana split into South America, Africa, Australia, Antarctica and India, which collided with the Asian plate.

... in solar input to Earth. Solar Cycle. 11-year ... Earth's climate is theoretically susceptible to episodes of global glaciation. ... Snowball Earth Glaciations ...

Index Fossils, Evolution, Biostratigraphy and the Geologic Time Scale Bio-Events First appearances of new species First appearances of new higher taxa Extinctions of ...