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The Earth Story

@earthstory / earthstory.tumblr.com

This is the blog homepage of the Facebook group "The Earth Story" (Click here to visit our Facebook group). “The Earth Story” are group of volunteers with backgrounds throughout the Earth Sciences. We cover all Earth sciences - oceanography, climatology, geology, geophysics and much, much more. Our articles combine the latest research, stunning photography, and basic knowledge of geosciences, and are written for everyone!
We hope you find us to be a unique home for learning about the Earth sciences, and we hope you enjoy!
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Original caption:

Te mostramos un breve resumen de la increíble experiencia de viajar a la ciudad más austral del mundo, USHUAIA. Ubicada en la Patagonia Argentina. Viví una de las más increíbles experiencias de la mano de Tiempo Libre Viajes.
Translated: We show you a brief summary of the incredible experience of traveling to the southernmost city in the world, USHUAIA. Located in the Argentine Patagonia. I lived one of the most incredible experiences of the hand of Free Time Travel.
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Despite the number of guidebooks and travel articles that has been written about Patagonia, every journey in this fabulous but distant place has a story to tell. Mine explores the beautiful and rough landscapes of southern Chile and Argentina. Shot in almost 3 weeks while travelling from Ushuaia to El Chalten, from Tierra del Fuego to Torres del Paine.

The manifesto behind the story : There is a crisis going on with the health of our planet and soon there won't be trails for as to wonder if we don't use every tool at our disposal to do something about it.

4K ProRes footage available at : [email protected]

Music and VO credits: The VO is an Inuit poem that inspire me to put the footage together and is taken along with the music from Tim Kellner's movie: vimeo.com/188830438

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natgeotravel Video by @christian_foto ( Christian Rodríguez) View from Bridges island to "Isla de lobos " ( Island sea lion ) island in Beagle channel. Wildlife in beagle channel are rich in birds and marine mammals, fish and diverse invertebrates. The original inhabitants of the Isla Bridges were the Yamana, a nomadic tribe that moved between the islands by canoe. The Yamana developed a natural resistance against the sub-Antarctic climate by smearing their bodies with seal oil which may have been the reason why their body temperature was 1 degree higher than humans today. The region was named " Tierra del Fuego" (the Land of Fire) by the early European explorers who saw the dotted Yamana camp fires on the islands throughout the Beagle channel.
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natgeo Video by @christian_foto (Christian Rodriguez ) The Beagle Channel extends approximately 200 miles along the southern coast of Isla Grande de Tierra del Fuego. It starts from its connection with the Cockburn channel in the western entrance until Cape San Pio in its easternmost point, which separates Isla Grande from the Southern Islands and the southeast of ​"​archipelago Fueguino​"​. The Beagle name was given in homage to the British ​ship​ HMS Beagle, which made a hydrographic survey of the southern coasts of South America between 1826 and 1830. During the second voyage of the HMS Beagle, under the command of Captain Fitz Roy, the naturalist Charles Darwin was traveling on board. Darwin saw a glacier for the first time when he was arriving to the Beagle Channel on January 29 of 1833 and wrote in his notebook: I cannot imagine anything more beautiful than the beryl blue of these glaciers, especially when contrasted by the snow. Inside of the channel, there are many islands. In front of the Ushuaia bay exists a group of islands and islets, among them standout the Bridges islands and the Eclaireurs islets. Its waters are rich in birds and marine mammals, fish and diverse invertebrates. The lithodes santolla, most commonly known as southern king crab, is a typical dish of the region and it is well known for its meat which has a delicate flavor. Because of its ornithological richness, the Beagle Channel area is cataloged as one of the important areas for the conservation of birds of Argentina. For to know more about my trip in Ushuaia please follow @christian_foto Video by @christian_foto (Christian Rodriguez )
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Charles Darwin was wrong

(no, not about that part).

Today, February 12th, is the 205th birthday of one of history’s most famous scientists, Charles Darwin, celebrated throughout the world as Darwin Day.

Although Charles Darwin is best known for developing the theory of evolution by natural selection, that story is not his only contribution to science. These boulders relate to a different part of Darwin’s voyage on the HMS Beagle; the trip which took him to the Galapagos and drove development of his most famous theory. These boulders are a story Charles Darwin got wrong.

I think of myself as a geoscientist. In that sense, I might be able to talk in depth about many topics throughout Earth Science, but my field is still specialized. The kind of specialization common today is fundamentally different from the kind of science done by Darwin, who would have considered himself a “naturalist”; a scientist devoted to the natural world.

While on the Beagle, Darwin wasn’t just interested in the biology; he was interested in whatever he saw, including the rocks.

These rocks dot the shores near Bahía San Sebastian, south of the Straits of Magellan in Tierra del Fuego. When Charles Darwin saw these rocks, they reminded him of the writings of Dr. Charles Lyell, which described enormous blocks found on the ocean floor off the coasts of Newfoundland. Those rocks arrived via icebergs; floated across hundreds of kilometers of oceans. This process, boulders being carried by icebergs, had even been observed by ships; reports of which Darwin referred to in his writings.

Darwin studied the rocks of Tierra del Fuego and realized that far above the shorelines, the rocks contained oceanic fossils. With this fact in hand, he surmised that some geologic forces had lifted the fossils far above the modern day beach. And, since fossils from the ocean could be lifted to great heights, Darwin also surmised that these boulders were dropped on the ocean floor, carried originally by icebergs from Antarctica, and brought up to the surface by later geologic uplift.

Boulders like this, erratically strewn throughout the known world, were common and well-known. This process was Darwin’s explanation for their origin.

Several years ago, a group led by Dr. Evenson from Lehigh University investigated these exact rocks, matching their shape to those described by Darwin in his writings. You are looking at some of the exact rocks examined by Charles Darwin nearly 2 centuries ago.

If the rocks were emplaced as Darwin described, they should be unrelated to the rocks on Tierra del Fuego; they should derive from Antarctica. They should also be unrelated to each other – each iceberg would pluck boulders from a different location on Antarctica. The scientists tested the chemistry of the rocks and noted their geologic context. The boulders in this site are all of a similar composition, identical to a unit found higher up in the nearby mountains (now known as the Beagle granite). There are dozens of boulders at this site, all derived from the same unit.

By studying the surrounding geology, the scientists realized that they were standing on a terminal moraine – the place where a prehistoric glacier, born in the mountains above, had ended. By putting together the geologic history…they came to realize…Charles Darwin was wrong.

Although Darwin’s observations were interesting, he did not understand one detail at the time. It had yet to be recognized that, over the last several million years, ice sheets had repeatedly formed on the continents and expanded far out of the mountains. Charles Darwin understood the power of ice, but did not recognize that at one time, enormous ice rivers had migrated down from the mountains in Tierra del Fuego, carrying these rocks with them.

The kind of data available to us today allows us to tell the story of these rocks in far more detail than could be done in Darwin’s time, but in many ways, this story gives an interesting look into the type of science and thought done by the man at the time. In 1833, Charles Darwin delayed the voyage of the ship to stop and describe a few large chunks of rock found on the shores of a nearly-deserted part of the world, to try to tell their story. As a result, today we can tell the story both of these rocks and of the voyage of the Beagle as well.

-JBB

Image credit: Henry Patton (creative commons license) http://www.flickr.com/photos/hpatton/3717733679/

Full article: http://www.geosociety.org/gsatoday/archive/19/12/article/i1052-5173-19-12-4.htm

Source: facebook.com
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Charles Darwin was wrong Today, February 12th, is the 205th birthday of one of history’s most famous scientists, Charles Darwin, celebrated throughout the world as Darwin Day. Although Charles Darwin is best known for developing the theory of evolution by natural selection, that story is not his only contribution to science. These boulders relate to a different part of Darwin’s voyage on the HMS Beagle; the trip which took him to the Galapagos and drove development of his most famous theory. These boulders are a story Charles Darwin got wrong. I think of myself as a geoscientist. In that sense, I might be able to talk in depth about many topics throughout Earth Science, but my field is still specialized. The kind of common today is fundamentally different from the kind of science done by Darwin, who would have considered himself a “naturalist”; a scientist devoted to the natural world. While on the Beagle, Darwin wasn’t just interested in the biology; he was interested in whatever he saw, including the rocks. These rocks dot the shores near Bahía San Sebastian, south of the Straits of Magellan in Tierra del Fuego. When Charles Darwin saw these rocks, they reminded him of the writings of Dr. Charles Lyell, which described enormous blocks found on the ocean floor off the coasts of Newfoundland. Those rocks arrived via icebergs; floated across hundreds of kilometers of oceans. This process, boulders being carried by icebergs, had even been observed by ships; reports of which Darwin referred to in his writings. Darwin studied the rocks of Tierra del Fuego and realized that far above the shorelines, the rocks contained oceanic fossils. With this fact in hand, he surmised that some geologic forces had lifted the fossils far above the modern day beach. And, since fossils from the ocean could be lifted to great heights, Darwin also surmised that these boulders were dropped on the ocean floor, carried originally by icebergs from Antarctica, and brought up to the surface by later geologic uplift. Boulders like this, erratically strewn throughout the known world, were common and well-known. This process was Darwin’s explanation for their origin. Several years ago, a group led by Dr. Evenson from Lehigh University investigated these exact rocks, matching their shape to those described by Darwin in his writings. You are looking at some of the exact rocks examined by Charles Darwin nearly 2 centuries ago. If the rocks were emplaced as Darwin described, they should be unrelated to the rocks on Tierra del Fuego; they should derive from Antarctica. They should also be unrelated to each other – each iceberg would pluck boulders from a different location on Antarctica. The scientists tested the chemistry of the rocks and noted their geologic context. The boulders in this site are all of a similar composition, identical to a unit found higher up in the nearby mountains (now known as the Beagle granite). There are dozens of boulders at this site, all derived from the same unit. By studying the surrounding geology, the scientists realized that they were standing on a terminal moraine – the place where a prehistoric glacier, born in the mountains above, had ended. By putting together the geologic history…they came to realize…Charles Darwin was wrong. Although Darwin’s observations were interesting, he did not understand one detail at the time. It had yet to be recognized that, over the last several million years, ice sheets had repeatedly formed on the continents and expanded far out of the mountains. Charles Darwin understood the power of ice, but did not recognize that at one time, enormous ice rivers had migrated down from the mountains in Tierra del Fuego, carrying these rocks with them. The kind of data available to us today allows us to tell the story of these rocks in far more detail than could be done in Darwin’s time, but in many ways, this story gives an interesting look into the type of science and thought done by the man at the time. In 1833, Charles Darwin delayed the voyage of the ship to stop and describe a few large chunks of rock found on the shores of a nearly-deserted part of the world, to try to tell their story. As a result, today we can tell the story both of these rocks and of the voyage of the Beagle as well. -JBB Image credit: Henry Patton (creative commons license) http://www.flickr.com/photos/hpatton/3717733679/ Full article: http://www.geosociety.org/gsatoday/archive/19/12/article/i1052-5173-19-12-4.htm

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