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Erratic, glacier-transported rock fragment that differs from the local bedrock. Erratics may be embedded in till or occur on the ground surface and may range in size from pebbles to huge boulders weighing thousands of tons. The distance of transportation may range from less than 1 km (0.6 mile) to more than 800 km (500 miles); those transported over long distances generally consist of rock resistant to the shattering and grinding effects of glacial transport. Erratics composed of unusual and distinctive rock types can be traced to their source of origin and serve as indicators of the direction of glacial movement. Studies making use of such indicator erratics have provided information on the general origins and flow paths of the major ice sheets and on the locations of important mineral deposits. Erratics played an important part in the initial recognition of the last ice age and its extent. Originally thought to be transported by gigantic floods or by ice rafting, erratics were first explained in terms of glacial transport by the Swiss American naturalist and geologist J.L.R. Agassiz in 1840.
originally posted by: dug88
a reply to: edmc^2
No. I've seen glacier deposited boulders. They look different. I've also had to identify the difference between glacial deposited boulders and water deposited ones on both the grround and from aerial photos.
Where I live was buried in ice until fairly recently geologically. There's lots and lots of examples of glacial deposition and erratics. Ocean rocks don't just climb mountains and water doesn't flow uphill.
Scientists say an ancient megatsunami hurled boulders nearly as high as the Eiffel Tower
originally posted by: edmc^2
originally posted by: dug88
a reply to: edmc^2
No. I've seen glacier deposited boulders. They look different. I've also had to identify the difference between glacial deposited boulders and water deposited ones on both the grround and from aerial photos.
Where I live was buried in ice until fairly recently geologically. There's lots and lots of examples of glacial deposition and erratics. Ocean rocks don't just climb mountains and water doesn't flow uphill.
Hey dug88, would you mind posting some videos or pictures showing boulders being moved or transported over long distances - not at just at the base of a mountain where avalanches are common.
BTW - when ice is formed they go over or around boulders - then stay frozen. They lack the power to transport large objects like boulders - especially uphill due to its low locomotive power and granularity.
Oops... forgot to post this:
Scientists say an ancient megatsunami hurled boulders nearly as high as the Eiffel Tower
www.washingtonpost.com... -tower/?noredirect=on&utm_term=.4cba8f9437b1
originally posted by: AngryCymraeg
originally posted by: edmc^2
originally posted by: dug88
a reply to: edmc^2
No. I've seen glacier deposited boulders. They look different. I've also had to identify the difference between glacial deposited boulders and water deposited ones on both the grround and from aerial photos.
Where I live was buried in ice until fairly recently geologically. There's lots and lots of examples of glacial deposition and erratics. Ocean rocks don't just climb mountains and water doesn't flow uphill.
Hey dug88, would you mind posting some videos or pictures showing boulders being moved or transported over long distances - not at just at the base of a mountain where avalanches are common.
BTW - when ice is formed they go over or around boulders - then stay frozen. They lack the power to transport large objects like boulders - especially uphill due to its low locomotive power and granularity.
Oops... forgot to post this:
Scientists say an ancient megatsunami hurled boulders nearly as high as the Eiffel Tower
www.washingtonpost.com... -tower/?noredirect=on&utm_term=.4cba8f9437b1
I don't think that you understand the sheer raw power of a glacier. Still less the vast glaciers that existed during the last ice age. Imagine a vertical wall of ice a mile high.
originally posted by: AngryCymraeg
a reply to: edmc^2
There was no global flood.
originally posted by: edmc^2
a reply to: AngryCymraeg
Thanks.
No argument there since there's still ICE in the area (Alaska) but what I was hoping for is a live video or pictures of it being carried over long distances.
Speed
The speed of glacial displacement is partly determined by friction. Friction makes the ice at the bottom of the glacier move more slowly than ice at the top. In alpine glaciers, friction is also generated at the valley's side walls, which slows the edges relative to the center.
Mean speeds vary greatly, but is typically around 1 m (3 ft) per day.[25]
originally posted by: visitedbythem
originally posted by: AngryCymraeg
a reply to: edmc^2
There was no global flood.
There most certainly was. My family lived in Turkey at the base of mount Ararat until 1910. My grandfathers uncle was Minister of Finance for Turkey. He was like royalty. People from out village have not only seen the Ark, they have been in and on it from time to time over the centuries. Grandfather said it was still in one piece, petrified to stone, super thick walls, enormous, partitioned inside, super tall, and with only a portion of the stern hanging out, maybe once a century after at least 15 years consecutive drought.
My father is a top US scientist. A genius with many titles,( Chemist, Microbiologist, engineer, parasitologist, Director of Research for a fortune 500 company, medical background from Stanford, and attended 5 colleges and has even been summoned to the White House by a Vice President, in order to advise the Vise President, and Secretary of Agriculture. They then sent him over seas on US business, and I got to go.
He is a very moral and honest man. He told me that his Dad would never lie to me. The Ark is still there, and my family knew where it is, and so did everyone else that lived there. Super high on the mountain. Very sensitive area to Turkey/ Russia, and people are not allowed to wander there.
There!
You all were just treated to a inside family story . Not some old wives tale either
1 m (3 ft) per day
Scientists say an ancient megatsunami hurled boulders nearly as high as the Eiffel Tower
originally posted by: edmc^2
a reply to: dug88
No doubt, glaciers move
1 m (3 ft) per day
But at this speed, can it transport a 10-ton boulder at an angle of say 5 degrees - uphill?
How about a water stream - say from a flash flood traveling at speeds of 5mph, can it transport a 10-ton boulder at an angle of say 5 degrees - uphill?
Without speculation which one has great potential?
I'd say water.
Scientists say an ancient megatsunami hurled boulders nearly as high as the Eiffel Tower
www.washingtonpost.com... -tower/?noredirect=on&utm_term=.a4b0e039ed2a
Warning!
Large chunks of ice containing boulders were carried by the water.
The velocity of a tsunami can be calculated by obtaining the square root of the depth of the water in metres multiplied by the acceleration due to gravity (approximated to 10 m/s2). For example, if the Pacific Ocean is considered to have a depth of 5000 metres, the velocity of a tsunami would be the square root of √(5000 × 10) = √50000 = ~224 metres per second (735 feet per second), which equates to a speed of ~806 kilometres per hour or about 500 miles per hour
On the rocky shores of a windswept island just west of Ireland, the 620-ton boulder looks almost at home. But careful analysis of its position over the last few years has revealed something odd: between the summers of 2013 and 2014, the boulder shifted a couple meters toward the sea. That discovery is causing scientists to rethink what they know about the impacts of powerful storms. In fact, the rock is one of more than a thousand boulders—including a handful of Very Large Boulders (VLBs and yes, that’s a technical term) weighing over 50 metric tons—shuffled around by the powerful storms that pounded Ireland’s west coast during the winter of 2013-2014, the stormiest in decades. Described in a new paper in the journal Earth Science Reviews, these boulders offer some of the first concrete evidence that storm waves, not just tsunami waves, can pack enough punch to hurl giant chunks of Earth around. (For comparison, 100 metric tons is about half the weight of a Boeing 747.)
Scientists say an ancient megatsunami hurled boulders nearly as high as the Eiffel Tower
originally posted by: edmc^2
a reply to: schuyler
Sure, I'm well aware of the Glacier Lake as well as the Ice Age, but quoting you:
Large chunks of ice containing boulders were carried by the water.
If there were no water to carry the chunks of ice, will the boulders moved/be transported to its current location - hundreds/ thousands of miles away?
originally posted by: schuyler
originally posted by: edmc^2
a reply to: schuyler
Sure, I'm well aware of the Glacier Lake as well as the Ice Age, but quoting you:
Large chunks of ice containing boulders were carried by the water.
If there were no water to carry the chunks of ice, will the boulders moved/be transported to its current location - hundreds/ thousands of miles away?
When the glaciers are expanding, sure. The ice is moving. It incorporates the boulders and drags them along as it moves forward. When it melts, the boulders are exposed. I don't see what all the fuss is about, really. Both methods are fairly well established. There is no mystery.
"Erratics" take their name from the Latin word errare (to wander), and are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock (15,000 tonnes or 17,000 short tons) in Alberta.
originally posted by: cooperton
"We know there was a global cataclysm that almost wiped out the entirety of life on the planet, but we know it was DEFINITELY not a global flood as described by the Hebrews, The Chinese, The Incas, The Sumerians, The Greeks, The Hindus, etc, etc, etc"
-A horse with blinders
originally posted by: edmc^2
originally posted by: schuyler
originally posted by: edmc^2
a reply to: schuyler
Sure, I'm well aware of the Glacier Lake as well as the Ice Age, but quoting you:
Large chunks of ice containing boulders were carried by the water.
If there were no water to carry the chunks of ice, will the boulders moved/be transported to its current location - hundreds/ thousands of miles away?
When the glaciers are expanding, sure. The ice is moving. It incorporates the boulders and drags them along as it moves forward. When it melts, the boulders are exposed. I don't see what all the fuss is about, really. Both methods are fairly well established. There is no mystery.
erratics is the fuss.
All the mechanics just don't add up when comparing it to water locomotion and it's all based on speculation NOT actual science and engineering.
"Erratics" take their name from the Latin word errare (to wander), and are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock (15,000 tonnes or 17,000 short tons) in Alberta.
No empirical evidence or mathematical evidence but just pure speculation. It's almost like blind faith.