Note: this topic is from 5/14/2015. Thanks JimSEA.
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Posted on 05/14/2015 12:45:29 PM PDT by JimSEA
PASADENA, Calif. — Shattered cave formations in the central United States may preserve one of the longest records of powerful earthquakes in this region.
Historical records from European settlers provide vivid accounts of deadly earthquakes in states such as Missouri, Tennessee and Illinois. For instance, in 1811 and 1812, people saw the ground ripple like ocean waves when the New Madrid Fault Zone unleashed earthquakes thought to be greater than magnitude 8.
However, no written accounts exist from before Europeans arrived. And most earthquake faults in the Midwest are hidden deep beneath the surface, so scientists can't dig into the earth and date rocks disturbed by earlier shaking. Without a good tally of past temblors, it's hard to say when future quakes will strike.
Geologist John Tinsley says smashed cave formations could provide a new way to fill in the seismic gap. Strong earthquakes in the central United States disturbed many caves at the same time, Tinsley said yesterday (April 21) here at the annual meeting of the Seismological Society of America. [Photos: The World's 7 Longest Caves]
(Excerpt) Read more at livescience.com ...
It must have been cause by all the fracking back in those days.
We are in southern California a thousand miles away from the Yellowstone super volcano, what could go wrong?
Good afternoon.
Which was first, the New Madrid fault, or the Miss. River?
5.56mm
You've got Moonbeam, High Speed Trains, super drought, Delta Smelt, super-majority Democrat legislatures for as far as the eye can see, San Francisco, Santa Anna winds in a drought, Hollywierd, super-tsunami if Catalina Island slumps into the sea ....
And you ask about this?!
True, and the first time Moonbeam was Gov. he got unions into state jobs making them impossible to pay for between the retirements, benefits and wages.
People also forget Jerry gave away our old water rights back to two states leaving us high and dry or paying through our ass for water.
I can recall something about mid continent rifts both in the Great Lakes area / St. Lawrence River and then along the line of the Mississippi/New Madrid. So I’d say the faults and the river co evolved with some rift induced faulting leading the way. Fault zones are the products of plate movement which can paint complicated pictures when you go back a while.
Must have Zerocare or VA.../s
The New Madrid fault has to precede the New Rockies which go back 65 million years or so. The Mississippi couldn’t precede the last ice age which ended 12,000 years more or less, ago. During the last ice age, as well as previous ice ages, the lower Miss. couldn’t have been more than a creek.
How about seismic tomography?
Well, you might locate a fault zone but you can’t time the repetitions. The cave will indicate when there was a big quake but won’t tell you just where the fault was. Might be complimentary however, don’t you think?
By all means.
Note: this topic is from 5/14/2015. Thanks JimSEA.
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Note: this topic is from 5/14/2015. Thanks JimSEA.
The very massive, and frightening series of New Madrid quakes 200 years ago can happen again. If it does, St. Louis will not be a happy place. However, I have read other reports that suggest that the really bad ones happen there more on a 400 year schedule. Don’t remember where I saw that, but have been interested in NM for years. Caracas, Venezuela had a severe quake in that period that killed 20,000.
Early results from caves in southern Indiana, near the Wabash Valley Seismic Zone, and in Tennessee, in the East Tennessee Seismic Zone, suggest earthquakes are fewer and far between in these regions. The damaged cave growths hint at strong quakes hitting every 6,000 years, Tinsley said.
Tinsley noted that the cave evidence is only a circumstantial argument for ancient earthquakes. That's because floods and erosion can also collapse many cave rocks at the same time. Even a blundering bat can knock down the delicate soda straws, he said. Humans have also altered caves in the central and eastern United States for thousands of years.
The prob’ with quakes and eruptions is, they have no schedule. Same can be said for large impacts from space. They just happen when they happen. :’)
There’s always a lot of talk about how CMEs and low-altitude nuclear explosions could ruin our electronics-dense civilization. A really large impact from space really could do that. The EMP from that would probably do the job.
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