How worried we should be because the earth’s crust is cracking

The geography of India is very influenced by the tectonic plate associated with this subcontinent. This is remarkable in places like the Himalayas, the result of the clash between this plate and the Eurasian. However, dynamics change and plates can disintegrate. Horizontal cut. A New hypothesis On the interaction between tectonic plates, it could yield new doubts about the geological process that gave the Himalayan mountain range the highest peaks in the world. It would be an interaction never designed before: the horizontal break of a tectonic plate. The clash of an era. The mountain range between the heart of the Asian continent and the Indian subcontinent was formed between 40 and 50 million years ago when the Indian continental plate crashed into the Eurasian plate. The accumulation of the volume of these two masses of land implied that the earth’s crust was becoming thicker in this region, creating a colossal mountain range. This is a still unfinished process since the Indian plaque continues if it derives north, accumulating more mass and raising even more summits such as Everest. The mountain range grows at the rate of one centimeter per year. The subduction of the plate. So far the dominant hypothesis about what was happening underground in that border region contemplated the idea that the Indian plaque was undergoing a subduction process. That is, the Indian plaque was immersing under the Euroasyathic. At the same time, the Eurasian plate is transformed, folding and increasing in thickness, generating a region where the earth’s crust is more bulky. The new hypothesis Contemplate a different scenario. A new hypothesis. In it, part of the Indian plaque would be suffering a subduction process, but not all. As a knife cutting a bread bar to prepare a snack, the eurasian plate would be cutting in two, horizontallythe Indian plaque. This would imply that it would be part of the latter that would also be in the superficial zone, wrapping the Eurasian plate. Those responsible for this idea presented their defense at the conference of the American Geophysical Union and Through an article In the repository Ess Open Archive. Two ways to break. The rupture of a tectonic plaque is not a phenomenon at all strange. An example We can find it in Africa and its tectonic plate. The African continent as we know it will disappear in a few million years when a fracture divides it by two throughout a North-South Axis that will separate the easternmost area from the continent from the rest of Africa. This is the conventional rupture that allows tectonic plates to reorganize thereby causing continental drift. A drift that still keep many secrets That we are just beginning to discover. In Xataka | We just found the remains of a tectonic plate under the Pacific. And they shouldn’t be there In Xataka | How the Andes became so great in such a short time had always been a mystery. Until now Image | POT *An earlier version of this article was published in February 2024

The earth’s crust is disappearing under California. The test is in its earthquakes

The border between the mantle and the land cortex is a region that attracts interest of numerous geologists. Being so close and so far from the reach of the instruments that these scientists use perhaps a certain mysticism to this region, but above all, because the dynamism of The interactions Among the outermost layers of our planet makes this border a specially active region at the geological level. Scratching the bark. Now, a new study He has revealed A new aspect of this interaction. He has done it in the Sierra Nevada Californiana, or rather under this Sierra, where they have found evidence of how the mantle “pela” the earth’s crust. Delamination Geologists believe that, from time to time, fragments of the lithosphere end up detaching themselves and sinking into the upper layers of the terrestrial mantle. This process is known as alamination or sinking of the lithosphere and could be responsible for the notable differences in the thickness of the oceanic crust in contrast to the continental cortex, among other characteristics of the geology and geography of the planet. Generally, this process is seen as a “drip”: the heaviest rock of the cortex loses consistency and ends up detaching from the lithosphere to sink into the mantle, composed of less dense materials. However, Maybe this delamination is more abruptsomething like the terrestrial mantle “pelara” the cortex. Seismic waves. As usual in this type of studies, the team analyzed the way in which seismic waves move through the interior layers of the Earth in order to study factors such as the composition and density of these layers. Sierra Nevada is a seismically active region, which implies a greater ease to compile data in this way. The researchers responsible for the study They combined various sources of seismic data in their study, starting with this analysis, called the receiving function. The team combined it with the exhaustive catalog data of the Advanced National Seismic System (COMCAT). In this catalog they detected the presence of a “band of seismicity” in the region, located from 40 kilometers under the surface, which concentrated small earthquakes of magnitudes between 1.9 and 3.2. Break, I don’t drip. Thanks to the differences detected through the receiving functions, the equipment was able to find a differentiated layer in the mantle, a not so differentiated layer as it extends to the north and that is consistent with the hypothesis that part of the lithosphere in the South Zone broke out of the cortex several million years ago. The small earthquakes on the other hand, could be indicative that this detachment was made for breakage instead of drip, according to the authors of the study. The details of this analysis were published In an article In the magazine Geophysical Research Letters. Strengthening the hypothesis. The evidence is not yet conclusive as the team admits, but they add to the already numerous that support the hypothesis that the discontinuity of Mohorovičić (the border between the cortex and the upper mantle of the earth) is not abrupt under the mountain range from Sierra Nevada, but rather gradual. In Xataka | We knew that Yellowstone hid an immense volcano but not the place he would explode. Until now Image | Arttower

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