Galerie d'images
Toutes les images de la base — taxons, formations et intervalles géologiques.
⚠ La fonctionnalité de récupération des images est en cours de test, des images non pertinentes peuvent apparaître.
402 image(s)
A mollweide map of Earth 250 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 225 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 255 million years ago, overlayed by a black outline of present-day countries in their respective locations.
Mollweide map of Earth 260 million years ago, with black outlines depicting countries in their locations
A mollweide map of Earth 265 million years ago, overlayed by a black outline of present-day countries in their respective locations.
Mollweide map of Earth 270 million years ago, with black outlines depicting countries in their locations
A mollweide map of Earth 275 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 275 million years ago, overlayed by a black outline of present-day countries in their respective locations.
Mollweide map of Earth 295 million years ago, with black outlines depicting countries in their locations
A mollweide map of Earth 285 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 310 million years ago, overlayed by a black outline of present-day countries in their respective locations.
Mollweide Map of Earth 320 Million Years Ago, Black Outlines Depicting Countries in their locations
A plate tectonic reconstruction of Asia in 19 images. View centred on 0°,105°. Made using Gplates and the following data sets: Amante, C. and Eakins, B. W. 2009. ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24, 19. Wright, N., S. Zahirovic, R. D. Müller, and M. Seton (2013), Towards community-driven, open-access paleogeographic reconstructions: integrating open-access paleogeographic and paleobiology data with plate tectonics, Biogeosciences, 10, 1529-1541
A mollweide map of Earth 340 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 340 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 330 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 330 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 370 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 390 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 390 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 390 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 390 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 405 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 405 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A plate tectonic reconstruction of Asia in 19 images. View centred on 0°,105°. Made using Gplates and the following data sets: Amante, C. and Eakins, B. W. 2009. ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24, 19. Wright, N., S. Zahirovic, R. D. Müller, and M. Seton (2013), Towards community-driven, open-access paleogeographic reconstructions: integrating open-access paleogeographic and paleobiology data with plate tectonics, Biogeosciences, 10, 1529-1541
A mollweide map of Earth 450 million years ago, overlayed by a black outline of present-day countries in their respective locations.
Earth during the Middle Ordivician Period @ 460 Ma. Gondwana is seen above the equator (Australia & South China) and bellow the equator (North China, Kazakh terranes, Tarim, Antartica, India, Madagascar, Africa and South America). Laurentia, Baltica & Sibera are seperate continents, with Avalonia on its way to collide Baltica to form the Calledonian Orogeny, and Acadia on its way to collide Laurentia to form the Acadian Orogeny. Legend: Dark blue = ocean Light blue = shallow seas Tan = landmass Black outlines = modern day coastlines showing their respective positions
Rock from the Skiddaw Group, of Ordovician (Tremadocian) age, at Scawgill Bridge quarry in Cumbria, England, UK.
A mollweide map of Earth 480 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 465 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 465 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 495 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 495 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A render of Miolingian (Drumian) earth with focus on the continent of Laurentia, a cyclone is visible to the north. Intended to represent Wheeler Shale deposition
A mollweide map of Earth 505 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 530 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 510 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 600 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A mollweide map of Earth 690 million years ago, overlayed by a black outline of present-day countries in their respective locations.
This is a collage that represents three periods of Neoproterozoic and is composed of three images from Commons: File:Otavia antiqua 3D reconstruction.jpg represents Tonian period (1000-720 mya), marked by start of evolution of animals. File:AntarcticaDomeCSnow.jpg represents Cryogenian period (720-635 mya), marked by worldwide glaciations (aka "Snowball Earth"). File:Life in the Ediacaran sea.jpg represents Ediacaran period (635-541 mya), marked by first recognizable animal fauna - vendobionts.
A mollweide map of Earth 750 million years ago, overlayed by a black outline of present-day countries in their respective locations.
A map of Proto-Rodinia on 1040 mya.
A reconstruction of the earth's continents during the Ectasian period, circa 1260 Ma.
Banded fine-grained pyrite in shale from the Precambrian of Australia. (public display, Leadville Mining Museum, Leadville, Colorado, USA) A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. The sulfide minerals contain one or more sulfide anions (S-2). The sulfides are usually considered together with the arsenide minerals, the sulfarsenide minerals, and the telluride minerals. Many sulfides are economically significant, as they occur commonly in ores. The metals that combine with S-2 are mainly Fe, Cu, Ni, Ag, etc. Most sulfides have a metallic luster, are moderately soft, and are noticeably heavy for their size. These minerals will not form in the presence of free oxygen. Under an oxygen-rich atmosphere, sulfide minerals tend to chemically weather to various oxide and hydroxide minerals. Pyrite is a common iron sulfide mineral (FeS2). It’s nickname is “fool's gold”. Pyrite has a metallic luster, brassy gold color (in contrast to the deep rich yellow gold color of true gold - www.flickr.com/photos/jsjgeology/sets/72157651325153769/), dark gray to black streak, is hard (H=6 to 6.5), has no cleavage, and is moderately heavy for its size. It often forms cubic crystals or pyritohedrons (crystals having pentagonal faces). Pyrite is common in many hydrothermal veins, shales, coals, various metamorphic rocks, and massive sulfide deposits. The rock shown above consists of numerous bands of fine-grained pyrite interbedded with dark shale. Published research has shown that the pyrite is diagenetic, formed by sulfate reduction from sulfate-bearing groundwater that moved along bedding planes of the Urquhart Shale host rocks (see Painter et al., 1999). The sulfate source was evaporitic gypsum-anhydrite-barite in the same stratigraphic unit. Stratigraphy: Urquhart Shale, Mount Isa Group, Mesoproterozoic, ~1655 Ma Age of metamorphism: peak greenschist-facies metamorphism at ~1505 Ma during the Isan Orogeny Locality: Mount Isa Mines, northwestern Queensland, northeastern Australia Some info. from: Kawasaki & Symons (2010) - Dating of Mesoproterozoic metamorphism in the Mount Isa and George Fisher Zn-Pb-Cu-Ag deposits, Australia, by paleomagnetism. American Geophysical Union, Fall Meeting 2010, Abstract GP33C-0953. Painter et al. (1999) - Sedimentologic, petrographic, and sulfur isotope constraints on fine-grained pyrite formation at Mount Isa Mine and environs, northwest Queensland, Australia. Economic Geology 94: 883-912. Photo gallery of pyrite: www.mindat.org/gallery.php?min=3314
A reconstruction of the earth's continents during the Calymmian period, circa 1590 Ma.
A reconstruction of the earth's continents during the Statherian period, circa 1740 Ma.
A reconstruction of the earth's continents during the early Orosirian, circa 2000 Ma.
This image shows a 2.1 billion year old rock containing black-banded ironstone. The rock weighs about 8.5 tons, and is approximately two meters high, three meters wide, and one meter thick. It was found in North America and belongs to the National Museum of Mineralogy and Geology, Dresden, Germany. The rock is located at +51°2'34.84" +13°45'26.67".
A collage depicting four major events during the Proterozoic eon: File:Snowball Huronian.jpg File:Ramathallus lobatus.png File:AntarcticaDomeCSnow.jpg File:Ediacaran ecosystem diorama NMNH.jpg
A reconstruction of the earth's continents during the middle Neoarchean, circa 2650 Ma.
Banded iron formation from the Precambrian of Wyoming, USA. (~10.9 cm across at its widest) Banded iron formations, or BIFs, are unusual, dense sedimentary rocks consisting of alternating layers of iron-rich oxides and iron-rich silicates. Most BIFs are Proterozoic in age (although some are Late Archean), and do not form today - they're “extinct”! Many specific varieties of iron formation are known, and some are given special rock names. For example, jaspilite is an attractive reddish & silvery gray banded rock consisting of hematite, red chert (“jasper”), and specular hematite or magnetite. Because of their age, most BIFs have been around long enough to have been subjected to one or more orogenic (mountain-building) events. As such, most BIFs are folded and/or metamorphosed to varying degrees. BIFs are known from around the world, but some of the most famous & extensive BIF deposits are found in the vicinity of North America’s Lake Superior Basin. Many BIFs have economic concentrations of iron and are mined. BIFs are the most important variety of iron ore on Earth. Some iron mines in west-central Wyoming exploit BIFs in the Goldman Meadows Formation, a Mesoarchean unit exposed in the Wind River Range. These rocks have been multiply metamorphosed during the Precambrian. The result of this metamorphism is highly contorted folding and fracturing. The rock shown above is a folded quartz-hematite-limonite meta-BIF. Stratigraphy: iron formation member (probably the upper iron formation member) of the Goldman Meadows Formation, upper Mesoarchean, 2.87 Ga (metamorphosed in the Archean at 2.8 Ga and in the Mesoproterozoic at 1.4 Ga) Geologic context: northwestern flank of the South Pass Greenstone Belt, southern Wind River Range Locality: Atlantic City Iron Mine (open-pit mine; sample possibly collected from tailings piles around the now-flooded pit) (E1/2 of section 26, T30N, R100W, Miners Delight 7.5' USGS topographic quadrangle), South Pass-Atlantic City Mining District, along Rt. 28, southwestern side of South Pass, north of Atlantic City, southwestern Fremont County, west-central Wyoming, USA (mine is at 42° 32' 45" North latitude, 108° 44' 33" West longitude)
Reconstruction of Vaalbara supercontinent
Greenlandite (fuchsite-quartz gneiss) (2.7 cm across at its widest) from the Precambrian of southwestern Greenland. Green = fuchsite; gray = quartz; a few small, scattered pyrite crystals (brassy gold-colored) are also visible. Attractive greenish-colored gneisses in southwestern Greenland that contain the minerals fuchsite (green) and quartz (gray) have been informally called greenlandite. Fuchsite is a chromian muscovite mica (K(Al,Cr)2AlSi3O10(OH,F)2 - potassium chromium hydroxy-fluoro-aluminosilicate); it is typically encountered in schistose rocks. Greenland greenlandite is part of a 3.8 billion year old, highly metamorphosed succession of rocks. These represent the oldest known supracrustal rocks on Earth (the oldest crustal Earth rocks include 4.03 billion year old Acasta Gneiss, 4.28 b.y. rocks from the eastern Hudson Bay area, and 4.45-4.55 b.y. rocks in the subsurface of Baffin Island, Canada). Locality: undisclosed locality in the Godthåbsfjord area or Nuuk area, southwestern Greenland. Age: Eoarchean boundary, 3.8 billion years.
This artist's concept shows a celestial body about the size of our moon slamming at great speed into a body the size of Mercury. NASA's Spitzer Space Telescope found evidence that a high-speed collision of this sort occurred a few thousand years ago around a young star, called HD 172555, still in the early stages of planet formation. The star is about 100 light-years from Earth.
DUVALIA LATA (BLAINVILLE), VALANGINIAN, SELISHTE, GABROVO PROVINCE AT SOFIA UNIVERSITY 'ST. KLIMENT OHRIDSKI' MUSEUM OF PALEONTOLOGY AND HISTORICAL GEOLOGY
Elasmobranchs teeth and vertebrae from the Thanetian phosphatic serie of Jebel Dyr (Algerian-Tunisian border area); 23. Raja sp.; 24. Heterodontus sp.; 25. Dasyatis hexagonalis; 26. Abdounia beaugei; 27. Physogaleus secundus; 28. Carcharias hopei; 29-30. Cretalamna appendiculata; 31. Brachycarcharias lerichei; 32. Isurolamna affinis; 33-36. Sectioned fossil vertebral centrum of sharks. a: labial; b: lingual; c: lateral; d: occlusal; e: oral views.
Rebun Island lies in the Sea of Japan off the northwestern tip of Hokkaido and is part of the Rishiri-Rebun-Sarobetsu National Park. Momoiwa ("Peach Rock") was created in a relatively new era of Rebun Island's strata when underground magma pushed the earth's surface upward where it cooled into a huge spherical rock formation. Spheroidal joints (plate-shaped joints on the surface) peeled away like the skin of an onion, revealing the scree, which cooled at a slower rate than the surface, creating the columnar jointing that can be seen.