澳大利亚昆士兰的斯塔克国家公园上空曾经有冰川吗?-地江南体育网页版球科学堆栈交换江南电子竞技平台 最近30个来自www.hoelymoley.com 2023 - 04 - 08 - t05:21:03z //www.hoelymoley.com/feeds/question/9261 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/9261 3. 澳大利亚昆士兰的斯塔克国家公园上空曾经有冰川吗? 瑞安弗朗茨 //www.hoelymoley.com/users/7108 2016 - 12 - 07 - t03:54:21z 2016 - 12 - 11 - t22:05:22z 当我在澳大利亚北部偶然发现某种岩层时,我正在随机探索地球。岩层相对于澳大利亚的位置如下所示。它位于斯塔克国家公园内或附近。< / p >

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Of course it seems absurd (to me) to think a glacier could have existed there anytime even remotely recent in geologic history. But there's a rock formation there that looks like it has been carved up by a glacier. Here's a screenshot of google earth satellite data of the rock formation in question:

enter image description here

Notice the clear distinction between the "carved land" and the vegetation to the south and west, this is one of the traits I find confusing about this structure.

I tried researching the park to see if there is a scientifically accepted origin for this formation, but all I learned is that it is apparently made from sandstone, and the region is noted for being very rugged.

I'm not a geologist, so I might be missing some important info that could help, but I have at least a basic understanding of geology from a few electives I've taken in college. I know that glaciers carve up the land, and when they retreat, they leave behind a mess of jagged rocks and lakes that are aligned in the direction of flow of the former glacier. The above picture seems to show just that: there is a clear sense of direction of the lakes and rocks.

Additionally, I was able to find one other similar formation about 400km (~250 miles) north east up the Australian coast (measured as a straight line) near the Sir Charles Hardy Islands. I would show a pic of that as well, but I'm limited because I'm new here.

Other than these two formations, I was unable to find any other examples. Both formations highly contrast their surroundings and both seem to be "smeared" in roughly the same direction.

For reference, look closely at the land in northern Canada and Europe, where glaciers are known to have existed geologically recently. (Again, I had pics but I can't post them.)

Does anyone know how the formation in question was created? If not does anyone have a strong educated guess about what might have caused it? Thanks in advance.

//www.hoelymoley.com/questions/9261/-/9263#9263 2 澳大利亚昆士兰的斯塔克国家公园上空曾经有冰川吗? 戈登斯坦格 //www.hoelymoley.com/users/4507 2016 - 12 - 07 - t07:52:38z 2016 - 12 - 07 - t07:52:38z 你说得很对。在那样的纬度和海拔,这些不可能是最近的冰川特征。而且,线条太一致了,不可能是冰川。事实上,你注意到的特征是全新世和更新世的海滩山脊。从地球上看,至少有一些山脊可能是赛义夫沙丘,因为也有细长的新月形沙丘,它们通常与赛义夫沙丘有关,并共享同一轴,与盛行风对齐。沙丘间湖泊也具有相同的一致的线理。< / p > //www.hoelymoley.com/questions/9261/-/9283#9283 4 澳大利亚昆士兰的斯塔克国家公园上曾经有冰川吗? norman_h //www.hoelymoley.com/users/6463 2016 - 12 - 11 - t06:21:24z 2016 - 12 - 11 - t22:05:22z 该地区构成了北澳大利亚克拉通的一部分,下面的基岩大约有18亿年的历史。在1575 - 16.65亿年前的沉积时期,基岩似乎被Isa超级盆地覆盖,并经历了eamin造山运动(1550 Ma)形成Georgetown Inlier。< / p >

About 500m years ago the Eastern seaboard of what is now Australia was under water and over the next 250m years continental subduction took place and Eastern Australia was geologically analogous to modern day Japan and China with an inland sea and a volcanic arc stretching from north to south. What was once this inland sea is now part of Australias rich coal basins, which stretch from Collinsville in Quensland all the way to Tasmania and they have also been correlated to coal deposits in Antarctica.

The region you question about, Starcke, is very close to what is known as the Tasman Line, which is a geological separation of the older 1.5 billion year old events and the younger 500 million year old events. The lines in the photo appear to be parallel to where the Tasman Line is shown to be. You'd really need to be on the ground checking out the geology to see how closely your photo images line up with the Tasman Line.

While all this was taking place, there was, amongst other events NE-SW compression of the continental crust along the Tasman Line which may have contributed to the geology in your picture. While I'd take a guess and say that many of those structures are folds (and they look like them too) I'd really need to put my boots on the ground and have a good look before I could say for sure.

Here's a link to an image of The Tasman Line.

http://economicgeology.org/content/97/1/109/F1.large.jpg

A guy called Nick Direen wrote some good papers on the Tasman Line. You might find more info if you google him.

Further to what I've written above, I've looked at the QLD government geological maps online at: https://minesonlinemaps.business.qld.gov.au/

As mentioned by Gordon, the surface geology is comprised of Quaternary age sand dunes which is indicated by the yellow colours. The purple areas are strata that is Devonian age and the small patches of pink are intrusive granites, which are typical of Eastern Australia. The sand dunes overlay the older rocks.

How much the underlying bedrocks influence the sand dunes? Without further research and boots on the ground, I'd have difficulty in saying.

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