What did Andrija Mohorovicic discover?
18, 1936, Zagreb, Yugos.), Croatian meteorologist and geophysicist who discovered the boundary between the Earth’s crust and mantle—a boundary subsequently named the Mohorovičić discontinuity.
How did Andrija Mohorovicic discover the compositional differences between the mantle and crust?
His studies after the earthquake showed that there were two types of waves generated from an earthquake that pass through solid material. The waves are reflected and refracted when they come to a boundary between two types of material – in other words, the boundary between the crust and the mantle.
What was used to determine the the Moho?
What is the Moho, and how is its depth determined? The Moho is the boundary between the crust and the mantle. Its depth is determined by observing where refracted seismic waves and direct seismic waves cross over each other. Heat flow is high where crust is being created.
Who first discovered the mantle?
In 1909 Andrija Mohorovicic (1857-1936), a Croatian seismologist, helped reveal the existence of the shallowest of these layers, the crust, and the underlying layer, the Earth’s mantle.
Who found the Moho?
The Moho is the boundary between the crust and the mantle in the earth. This is a depth where seismic waves change velocity and there is also a change in chemical composition. Also termed the Mohorovicic’ discontinuity after the Croatian seismologist Andrija Mohorovicic’ (1857-1936) who discovered it.
What is the average thickness of mantle?
The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume.
What is the Moho layer made of?
According to the theory, the water reacts with rocks in the mantle known as peridotite, chemically altering them to form a thick layer of a less dense mineral called serpentine. Hess called the Moho an “alteration front”—a boundary where mantle rock was altered to become serpentines.
What was Arthur Holmes evidence?
Holmes primary contribution was his proposed theory that convection occurred within the Earth’s mantle, which explained the push and pull of continent plates together and apart. He also assisted scientists in oceanographic research in the 1950s, which publicized the phenomenon known as sea floor spreading.
When was Andrija Mohorovicic born and when did he die?
Andrija Mohorovičić, (born Jan. 23, 1857, Volosko, Croatia, Austrian Empire [now in Croatia]—died Dec. 18, 1936, Zagreb, Yugos.), Croatian meteorologist and geophysicist who discovered the boundary between the Earth’s crust and mantle—a boundary subsequently named the Mohorovičić discontinuity.
What did Andrija Mohorovicic do in Bakar?
During his stay in Bakar, Mohorovičić came for the first time into direct contact with meteorology, which he taught to students. This stimulated his interest in the problems of this science. In 1887 he established a meteorological station and he maintained continuous meteorological observations.
What kind of language did Andrija Mohorovicic speak?
The son of a shipyard carpenter, he was a precocious youth and by the age of 15 spoke not only Croatian but English, French, and Italian, to which he later added Latin and Greek as well as Czech and German. He studied under the physicist and philosopher Ernst Mach at the University of Prague and was graduated in mathematics and physics (1875).
Where did Andrija Mohorovicic find the Moho discontinuity?
Between them lay what was later named the Mohorovičić discontinuity. Much later observations by more sophisticated instruments confirmed his discovery. Often referred to as simply the Moho, this crust–mantle interface lies at a depth of about 35 km (22 miles) on continents and about 7 km (4.3 miles) beneath the oceanic crust.