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.
4,826 image(s)
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.
Oxfordian (Upper Jurassic) cyclic sediments at Péry-Reuchenette, near Tavannes, kanton Bern, Switzerland. Alternating layers are limestone (light, more competent) and marl/clay; dominant cycle is the 200.000 year-cycle.
West of Chilton Chine The coastline west of the chine is accessible at lowish tides. The various rock strata in the Wealden Beds can be seen, with the chalk of Highdown Cliffs SZ3285 beyond.
Map of Cretaceous-aged dinosaur fossil localities of Mongolia. Gobihadros mongoliensis was collected from Bayshin Tsav in Area C. Open squares indicate Late Cretaceous sites, solid squares represent Early Cretaceous localities. Abbreviations: A, Localities of Western Gobi Desert in Mongolia, mainly group of localities of Nemegtian age (early Maastrichtian), Late Cretaceous; B, Localities of Central Gobi Desert in Mongolia, mainly Djadokhtian age (Campanian), Late Cretaceous; C & D- Localities of Eastern Gobi Desert in Mongolia, mainly Baynshirenian age (Cenomanian-Santonian), Late Cretaceous. Figure has been modified from Tsogtbaatar et al. 2014, Figure 1 [24].
Bexhill Brick Pit below Little Higher Wood in East Sussex, England. The cliff shows the layers of strata of the Hastings Beds with grey areas of Wadhurst Clay needed for the bricks and tiles. The buff/brown areas are sandstones.
Outcrops of the Foremost Formation along the Milk River.
Wayan Formation eggshell. Eggshell of the oogenus Macroelongatoolithus on a Wayan Formation outcrop. Image used courtesy of the USFS Paleontology Program
Sandstone cliff seen on Goffle Hill, part of First Watchung Mountain, in Hawthorne.
Life reconstruction of a pair of Galgadraco zephyrius in a late Maastrichtian environment, showcasing the palaeobiota of the Serra da Galga Geosite. Artwork by Matheus Gadelha.
Candeleros fm. (Upper Cretaceous) near Cerro El Vagon, Neuquen, Argentina.
The geological park of Aliaga (Teruel, Spain) is one of the most interesting geological zones of Aragon, a viewpoint of the last 200 million years of Earth's history.
Figure 2: Fossil vertebrate locality of Eric the Red West. Shore platform looking west, showing undulating erosive boundary (solid white line) between the top of the Anchor Sandstone (AS) and the base of the ETRW Sandstone (ES). White dashed lines indicate selected bedding surfaces. White scale in mid-ground (indicated by arrow) equals 1 m.
Restoration of the spinosaurid dinosaur Siamosaurus in the Sao Khua Formation palaeoenvironment, with Sunosuchus in the middle left and a herd of Phuwiangosaurus in the background. References: Siamosaurus based on tooth specimens [1] and the neural spine of a possibly referable skeleton[2], with other missing elements filled in with relatives (Suchomimus[3], Baryonyx[4], IchthyovenatorFile:Ichthyovenator_laosensis_skeletal_reconstruction_by_PaleoGeek.png). Phuwiangosaurus based on skeletal by Suteethorn et al. (2009)[5] and missing elements of skull of EuhelopusFile:Euhelopus.png. Sunosuchus based on Suteethorn and Ingavat (1983)[6] and missing elements based on Goniopholis[7].
Sibişel River (Strei) near the Sânpetru Mesozoic Formation, Romania
Geographical and geological location of the Los Quiñones site in the Blesa Formation. (A) Geological map of the Iberian Peninsula; (B) Location of the paleogeographical sub-basins within the Maestrazgo Basin; and (C) location of the Los Quiñones site close to the village of Obón (modified from14).
A broken concretion with fossils inside; Late Cretaceous Pierre shale, near Ekalaka, Montana.
Oxford Clay (Jurassic) exposed near Weymouth, England.
Ornithopod trackway at the Villar del Arzobispo Formation
Beach and cliffs, Egmont Bight The grey cliffs here are of Upper Kimmeridge Clay, and prone to erosion by storm waves coming in from the south-west. The small rocks in the foreground are the eroded remains of the foot of a mudslide from the Houns-tout cliff.
Horseshoe Canyon Formation exposed in Horseshoe Canyon near Drumheller, Alberta
Exposure of the Two Medicine Formation near "Egg Mountain" in northern Montana.