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Earth's crust and mantle, Moho discontinuity between bottom of crust and solid uppermost mantle. The Mohorovičić discontinuity (/ ˌ m oʊ h ə ˈ r oʊ v ɪ tʃ ɪ tʃ / MOH-hə-ROH-vih-chitch; Croatian: [moxorôʋiːtʃitɕ]) [1] – usually called the Moho discontinuity, Moho boundary, or just Moho – is the boundary between the crust and the mantle of Earth.
Project Mohole was an attempt in the early 1960s to drill through the Earth's crust to obtain samples of the Mohorovičić discontinuity, or Moho, the boundary between the Earth's crust and mantle. [2] The project was intended to provide an earth science complement to the high-profile Space Race.
This is now called the Mohorovičić discontinuity or (because of the complexity of that name) Moho. According to Mohorovičić, a layered structure would explain the observation of depths where seismic waves change speed and the difference in chemical composition between rocks from the crust and those from the mantle.
In 1909, Andrija Mohorovičić, one of the founders of modern seismology, [11] [12] [13] discovered and defined the Mohorovičić discontinuity. [14] Usually referred to as the "Moho discontinuity" or the "Moho," it is the boundary between the Earth's crust and the mantle. It is defined by the distinct change in velocity of seismological waves ...
The top of the mantle is defined by a sudden increase in the speed of seismic waves, which Andrija Mohorovičić first noted in 1909; this boundary is now referred to as the Mohorovičić discontinuity or "Moho." [3] The Moho defines the base of the crust and varies from 10 km (6.2 mi) to 70 km (43 mi) below the surface of the Earth.
1909 – Andrija Mohorovičić discovers the Moho discontinuity, the boundary between the Earth's crust and the mantle. [157] 1912 – Alfred Wegener suggests the continental drift hypothesis, that the continents are slowly drifting around the Earth. [158] 1915 – Robert Innes discovers Proxima Centauri, the closest star to Earth after the Sun ...
A piece of fossilized vomit, dating back to when dinosaurs roamed the earth, was discovered in Denmark, the Museum of East Zealand said on Monday.
Moho is a genus of extinct birds in the Hawaiian bird family, Mohoidae, that were endemic to the Hawaiian Islands. Members of the genus are known as ʻōʻō in the Hawaiian language . Their plumage was generally striking glossy black; some species had yellowish axillary tufts and other black outer feathers .