Posts treating: "quarry"
Monday, 15 February 2016
Today's new Earthlearningidea continues our field work series with 'Questions to ask at any rock face 5: sedimentary grains'.
Ask your pupils to answer the following questions when they are looking at any natural rock face - in a cliff, a quarry or a building.
- How big is the largest grain you can see? (estimate the length in mm or cm)
- When the sedimentary grains were being laid down,
These mammoth tusk pieces are on display at the Falls of the Ohio State Park Interpretive Center. They thought to be 12,000 to 20,000 years old. The tusks were unearthed at the Nugent Sand Company quarry in Bethlehem, Indiana, USA. Studying the dentine layers on these tusks can help researchers determine the age of the creature when it died.
I have not seen Indiana tusks in this good
It is now clear that the Guangdong landslide was a flowslide from a huge pile of construction waste in a quarry about the industrial
Fortunate Son’s luck has not run out! After digging through nearly a meter of nothing, Haviv came across a long bone that we think may be the tibia, or lower leg bone. Then as we were clearing out the space next to said possible tibia, guess who decided to join the holotype party…the quadrate!! Now … Continue reading The quarry that won’t quit
A virtual field trip to a quarry in far western Virginia, showing anomalous igneous intrusions (a dike and a sill) of Eocene age cross-cutting early Paleozoic
I've featured the brachiopod Digonella digona on my blog previously, about four years ago, with specimens that came from Luc sur Mer, Calvados Department, France. The specimen below comes from a quarry near Ranville, which is inland and south from Luc sur Mer. The fossil is preserved with a black colored calcite compared to the tan and grey of the other specimens. It also comes from Bathonian aged sediments (Jurassic) and likely the same rock formation. The shell of the species is longer than [...]
Here are another group of bivalve fossils that I found at the Deep Springs Rd. Quarry in Madison County, NY. The rock exposed at the quarry is the Moscow formation (Devonian, Givetian stage).The first fossil is a right valve from a Modiomorpha concentra showing the typical elongated oval shape with fine concentric growth lines on the surface of the shell.This species is somewhat common and I've blogged about them being found in the Mahantango Formation Here and Here.The next shell is squished [...]
This smooth, round snail like fossil is actually a cephalopod called a Gonaitite from the Moscow formation (Devonian, Givetian stage) that I found at a quarry off Deep Springs Rd. in Madison County, NY. They were precursors to ammonites and evolved from primitive bactritid type nautiloids. This specimen is a good size but does not preserve the sutures which would help to identify it. Tornoceras sp. is the most common genera in the Moscow formation and this could be a specimen of one. You can't [...]
For Christmas I received a Syma X11 Hornet quadcopter to learn how to fly. The videos make it look easier to fly than it is. Looking around YouTube for flying tutorials I came across a video of a Phantom quadcopter survey of a large flooded quarry. It has some nice images of submerged vehicles and tools in the water. Hopefully the embedded video in this posting can be seen at the end of
The pectin like pelecypods of the Devonian can be beautiful with their regular concentric ornamentation highlighted by radial ribs and "wings" along the hinge line. The fossil below is one that I do not recognize but I think I found a name for it while perusing the "Field Guide to the Devonian Fossils of New York" by Karl A. Wilson, 2014, Paleontological Research Institution.On page 148-149 is a pelecypod called Lyriopecten orbiculatus whose description is "Roughly circular shell with [...]
It's rare to find whole Peleycpod shells with no distortion so I was quite pleased to find this Nucula bellistriata fossil. It comes from the upper Ludlowville Formation (Devonian, Givetain stage) at Geer Rd. Quarry in Madison County, NY. Both valves are present and it even appears that one valve may still be preserved with shell material. It would be nice if the hinge line were better exposed but there is a stubborn piece of rock still clinging to that section of the fossil.Right [...]
May 8, 1733 two workers, Anders Halfwarder and Olof Sigräfwer, reported excited to superintendent Johan Gråberg, who was inspecting the quarry of Nybro near the village of Wamlingebo (Gotland, Sweden), a very strange discovery. While cutting large blocks of sandstone (of the 419Ma old Silurian Hamra-formation), Halfwarder spotted a frog sitting in the middle of
The small Terebratulid brachiopod Cranaena romingeri is one of the few smooth shelled brachiopods that can be found in the Silica Shale (Devonian, Givetian stage). It is distinctive despite it's rather mundane, unornamented appearance. The shell is oval shaped with two convex valves. The pedicle valve is a little longer than the brachial valve and is marked with an obvious circular depression (called the foramen) where the pedicle muscle would have extended outward. This specimen was [...]
I found the plate shown below in a quarry south of Syracuse that exposes the Edgcliff member of the Onondoga formation (Devonian, Eifelian stage). It was the only piece I found with such densely packed corals. I'm not entirely sure on the ID but a review of - STRATIGRAPHY OF THE ONONDAGA LIMESTONE (DEVONIAN) IN CENTRAL NEW YORK By William A. Oliver, Jr (Bulletin of the Geological Society of America VOL. 66. PP. 621-662. JULY 1954). leads me to believe these could be Coenites sp.
I didn't find too many gastropod fossils in the quarry, south of Syracuse, NY that exposed the Onondoga formation, except for this specimen. It's been weathered quite a bit but still looks pretty good. It's a Platystoma sp. gastropod and was found in the Edgecliff member of the Onondoga formation (Devonian, Eifelian stage).The specimen above looks similar to some Platysoma sp. Gastropods that I have from the Haragan formation in Oklahoma (Devonian, Lockhovian stage).I looked through the paper [...]
Two more brachiopods that I found in a quarry near Syracuse this past May are this Leptaena rhomboidalis.... ...and what I think is a Levenea lenticularisBoth specimens come from the Edgecliff member of the Onondoga Formation (Devonian, Eifelian stage) and were ID'ed using the paper "STRATIGRAPHY OF THE ONONDAGA LIMESTONE (DEVONIAN) IN CENTRAL NEW YORK By William A. Oliver, Jr (Bulletin of the Geological Society of America VOL. 66. PP. 621-662. JULY
Here are a pair of Pleurotomaria sp. gastropods that come from a quarry near Evrecy (southwest of Caen), France that excavates rock from the Bajocian stage of the Jurassic. The rock is very distinctive with a tan color that is speckled with small red hematite nodules.The first fossil is Pleurotomaria textilis still attached to the matrix. Then we have Pleurotomaria granulosa. The shell is not as tall as P. textilis but it still has that distinctive decoration along the whorls.Thanks to my [...]
Article
Now the Chicago 'blast' is an induced earthquake.
Reference
On June 7, 1974, at 19:45:37 GMT, an earthquake of magnitude 3.3 (mb, Nuttli) occurred at Wappingers Falls, New York (41°37.75′N, 73°56.5′W). The maximum intensity was Modified Mercalli V, with a radius of perceptibility of 10 km. This high intensity and rapid fall-off of intensity with distance are presumably associated
Article
Rotten seismic instrumentation has led to great confusion. On one hand the USGS says it is a single blast, but they can't even locate it right. This led to people blaming one quarry, when it was another. The area is thick with quarries. Also, it was first reported by some as a 3.8, now a 3.2.
Inspectors are crawling all over the place, but what can they tell? Suppose, the
Sorry for the lack of updates lately. We've been in South Dakota and Montana working the Hell Creek and Judith River Formations respectively.Jacob for scale before we open a Triceratops siteSouth Dakota had seen its fair share of rain, where we got rained out more in two weeks there than in my entire previous decade of Hell Creek digging combined. We pulled a few Triceratops bones and finished evaluating a few sites before moving on north.Nanotyrannus teeth collected from a single lag depositIn [...]
recommend this post
