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@melyanna

Bioarchaeologist ~ Anthropologist
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Nothing is ever as simple as we learned in school, and the composition of the Earth is no different. The mantle is not a uniform, spherical layer; it actually has enormous "blobs" that sit at the bottom of the mantle above the outer core. Like the mantle, these blobs appear to be made from rock, but may be hotter and heavier than their surrounding material. As of the this 2019 article, scientists have not decided what to call these blobs. The most common name is "large low shear velocity provinces," or LLSVP.

A new study from Arizona State University (ASU) suggests that these blobs are remnants of the proto-planet named Theia that collided with Earth. Part of Theia's mantle got stuck in the Earth's mantle, and other pieces of Theia were flung into space to create the moon. Initially, the Theian mantle bits were scattered through Earth's mantle. They did not "mix" because they are made of different materials - Theia was more iron-rich. After billions of years, the Theian fragments merged to create the LLSVPs. This origin hypothesis is not new, but the ASU team argues that their work is the most comprehensive to date.

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earthstory

Iguazu from above These falls illustrate a property of flood basalts (aka LIP or large igneous province), which have emerged in huge quantities from large fissures in the crust at odd intervals throughout Earth’s history, often contributing to mass extinctions along the way. As eruption succeeds eruption, sometimes with a prolonged gap in between which sees the development of a soil horizon that is then covered by the next layer, they form a series of distinct layers known as trapps, from the German for steps. The Deccan (roughly 65 million years old, and a factor in the death of the dinosaurs) and the Siberian (251 million years old, and the likely cause of the end Permian mass extinction, the worst ever seen in which ‘life nearly died’) trapps are the world’s most famous.

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🔮♦️💎 NEW CRYSTALS 💎 ♦️ 🔮

Orange Calcite Tower
Dream Amethyst Tower
Howlite Tower
Snowflake Agate Tower
Bumblebee Jasper Tower
Rhodonite Obelisk Tower
Pink Amethyst Tower
Orange Calcite Sphere
Obsidian Sphere with gold flash
Red Jasper Sphere
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Quino (17 July 1932 -  30 September 2020)

Joaquín Salvador Lavado Tejón, better known by his pen name Quino, was an Argentine-Spanish cartoonist. His comic strip Mafalda (which ran from 1964 to 1973) is popular in many parts of the Americas and Europe and has been praised for its use of social satire as a commentary on real-life issues.

Rest in Power Cinchona !