View allAll Photos Tagged SANDSTONE
Feel free to use these for whatever, provided you link back to where they came from. Also if you could show me the results that would be ace, because I'm nosy like that.
Locality: Coconino County, Arizona
These concretions are quartz sand grains cemented by calcium carbonate.
The Permo-Triassic Sydney Basin straddles Australia's central eastern coast in New South Wales. The basin covers 64,000 km2, 36,000 km2onshore and 28,000 km2offshore under water depths of up to 4,500 metres. The Sydney Basin is part of a major basin system that extends over 1,500 km from the Bowen Basin in Queensland through to the Gunnedah Basin in NSW. Onshore, the basin contains 4,500 metres of Permo-Triassic clastic sediments, while the offshore basin contains 6,000 metres of sediments. The basin overlies the Lachlan Fold Belt and Late Carboniferous volcanoclastic sediments. The basin formed during extension in the Early Permian, with half-graben infilled with the Dalwood and Talaterang Groups. Foreland loading followed with the compression of the Currarong Orogen in the Early Permian. Late Permian uplift associated with the New England foreland loading phase resulted in the formation of depocentres with the northeast Sydney Basin. These depocentres filled with pyroclastic and alluvial-paludual sediments of the Newcastle Coal Measures. In the Triassic, uplift of the offshore basin resulted in reworking of Permian sediments in fluvial environments. The basin underwent a final phase of deformation (thrusting) in the Middle Triassic. Extension and breakup in the Tasman Sea beginning in the Late Cretaceous resulted in the current structural boundaries of the basin's eastern margin.
Over 100 wells have been drilled in the onshore Sydney Basin, although no wells have yet been drilled offshore. The onshore basin contains rich coal deposits with associated natural gas and minor oil shows. The geochemistry of oil shows indicate a terrestrial source from a clay-rich environment, although not associated with the coal facies. The main trap types are anticlinal and overthrust, with some structural reactivation during Tasman Sea rifting.
Information sourced at.
Shatterconed sandstone in Ontario, Canada.
Shattercones are striated conical structures in rocks formed by a powerful shock wave or pressure front moving through during an impact event. They have a three-dimensional cone-like structure, with the points of the cones directed toward the shock wave origination site. Undisturbed shatterconed rocks will have the apex of the cones pointing toward the direction of the incoming object (i.e., upward - toward space).
The host rocks here consist of ~2.3 to 2.4 billion year old fluvial sandstones of the Mississagi Formation. Notice that the shattercones are pointing downward, indicating that the impact event also overturned the beds.
This outcrop is in the Sudbury Impact Structure, the site for one of the largest impact events in Earth history. The impact structure, located in southeastern Ontario, is ovoid in shape, about 37 miles long by 19 miles wide. It was originally ~circular, but has since been laterally compressed by tectonic deformation. Before erosion and structural deformation, the structure may have been between 60 and 120 miles across. The impacting object is estimated to have been about 6 miles in size. The impact event itself occurred at 1.85 billion years ago. At that time, this part of Ontario was ocean. Computer modeling indicates that the splash wave generated by the Sudbury Impact may have reached about 30 miles high and generated a ~300 feet high megatsunami that radiated away from the target area for up to ~1800 miles. The impact punched a hole down into underlying mantle rocks.
Abundant evidence indicates that the Sudbury, Ontario area was indeed the site of an impact long ago. This includes impact breccias, shattercones, and extensive syn-formational sulfide mineralization. The sulfides are rich enough for mining to occur. In fact, the Sudbury Mining District targets the # 1 most productive nickel deposit on Earth.
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This is a no-hammer outcrop.
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Stratigraphy: Mississagi Formation, upper Hough Lake Group, Huronian Supergroup, Paleoproterozoic, ~2.3 to 2.4 Ga
Locality: Ramsey Lake Road outcrop - roadcut on the southern side of Ramsey Lake Road, ~0.9 miles east of Paris Street (a.k.a. Long Lake Road; a.k.a. Route 80), southern side of the city of Sudbury, Sudbury Impact Structure, Ontario, southeastern Canada (46° 28’ 06.97" North latitude, 80° 58’ 46.21" West longitude)
Sandstone rocks polished by water along the banks of the Olifantsriver ("Elephants River") near the town Clanwilliam.
Like many of the geological formations in and around Cathedral Valley this one doesn't have a name but to me it looks more like a temple than the Solomon's Temple feature about a mile away. www.flickr.com/photos/19779889@N00/7029954741/
Upper Last Chance Road Wayne County, Utah.
For you that saw this already I uploaded again as a result of some interaction between Lightroom Publish and Flickr that deleted these two and scrambled all the rest of my photostream on Flickr.
This is the view of the school in Sandstone, Minnesota from the front yard of my house when I was growing up. It is no longer in use and is constructed of locally quarried sandstone--at one time a major employer of several hundred laborers--in 1901 (one half) and in 1910.
Grade schools were in the middle tier and high school in the top tier. My 2nd and 8th grade rooms are on the left.
In the absence of glass, the intricate sandstone balconies not only allow for breezes to enter the building but also give privacy.
The gail force winds and the huge seas we had last week have exposed many more new areas of sandstone at Seagreens. Heaven, I'm in heaven...
Liesegang banding at Maitland Bay Beach.
Terrigal Formation sandstone from the Triassic at Maitland Bay beach.
On the other side of the Hawkesbury, the corresponding rocks are Newport Formation sandstone. Above them both, the Hawkesbury sandstone, all from the Triassic.
Siderite is the mineral causing the colouration in these rocks, (FeCO3).
Triangular sandstone sarsen by the church at Beauchamp Roding in Essex.
Legend tells that when the church was being built in the valley, the villagers wanted to use this stone which was at the top of a hill. They dragged the stone down, but next morning it was on the hilltop again. So they dragged it down again, but next morning it was back at the top of the hill. They tried once more, but when it again returned to the top of the hill. they gave up and built the church on the hilltop next to the stone.
Faulted sandstone from the Jurassic of Wyoming, USA.
Faults are quite common in orogenic belts. Faults are defined as fractures in rocks along which differential displacement has occurred. Dip-slip faults are those involving movement of rocks in non-horizontal directions. Strike-slip faults involve movement of rocks in horizontal directions.
The two common types of dip-slip faults are normal faults and reverse faults. Normal faults form by extensional stress. Reverse faults form by compressional stress.
Locality: unrecorded/undisclosed site at or near the town of Guernsey, eastern Wyoming, USA