He suggested that at the centre of oceans, molten material would rise from the Earth’s mantle, causing new sea floor to be created, pushing the ocean floor. He also suggested that there were ocean trenches where old sea floor would then go back into the mantle, and molten. He found that these ocean trenches, the deepest parts of the ocean, were very near continental plates. Hess theorized that the action of the sea floor spreading caused continents to move apart and so this being evidence for continental drift, showing why it happened. The evidence of sea floor spreading was further supported by Vine and Drummond, who studied the magnetic pattern of the sea floor.
Evidence of sea floor spreading can be found in the Atlantic, where it is believed that the North American and Eurasian plates are moving apart at a constructive plate margin. New land has been created due to the magma rising through a rift and cooling quickly on the surface, also creating a ridge of volcanoes called the Mid-Atlantic ridge. The
G208: Volcanoes Chapter 7 : Kilauea, Hawaii 1. What is "volcanic tremor"? (page 94, para 2 to page 95) A volcanic tremor is a continuous, low-frequency vibration of the ground. 2. What do earthquake swarms indicate?
As well as landforms caused by river processes, such as the Bangladesh Delta – which can be seen via satellite - therefore a major landform. One major piece of evidence in support of a strong relationship between tectonic processes and major landforms on the Earth’s surface is the Mid Atlantic Ridge. The Mid-Atlantic Ridge is an underwater mountain range caused by a diverging tectonic plate along a constructive plate boundary located along the floor of the Atlantic Ocean. The MAR is the longest mountain range in the world, therefore is definitely one of the Earth’s major landforms, and is caused by tectonic activity therefore the relationship between tectonic activity and major landforms reinforced by this evidence. In the North Atlantic, the MAR separates the Eurasian and North American Plates, whereas in the South Atlantic it separates the African and South American Plates, this evidence emphasises the size of the MAR and backs up
The deepest part of the ocean is located in a trench south of Japan and north of Papua New Guinea c. The depth of the trench exceeds the height of Mount Everest. d. The depth of the trench is estimated at 5000 meters. e. The trench is called the Mariana Trench. 9. The nebular hypothesis suggest that: a. all bodies in the solar system formed from an enormous gas cloud.
This type of volcano can be recognized by its broad, gentle slopping shape. The lava dome that composes a shield volcano is usually built over a period of time. When this type of volcano erupts it often involves a flow after flow of lava. An example of shield volcano is Mauna Kea, which along with Mauna Loa forms the large island of Hawaii. The largest shield volcano in the solar system is Olympus Mons, on the planet mars.
Saint Helen a composite volcano (or stratovolcano), a term for steep sided, often symmetrical cones constructed of alternating layers of lava flows, ash and other volcanic debris. Composite volcanoes tend to erupt explosively pose considerable danger to nearby life and property. Before 1980, snow capped, gracefully symmetrical Mt. Saint Helens was known as the “Fujiyama of America.” Mt. Saint Helens, other active Cascade volcanoes, and those of Alaska form the North
These include.... * The eruption had left destruction in its wake, it created a ‘Pyroclastic Flow’ or ‘Nuée ardente’ (Glowing Cloud). This is a cloud of volcanic debris, made up of solid, semi solid and hot, expanding gases. The cloud behaves like a liquid, flowing down the slope of the volcano. It can reach up to and above 100Km/h and so destroys everything in its path. The pyroclastic flow from Mt.
Tension [pic] d. Compression 6. What is Earth's core composed of? [pic] a. hydrogen and iron b. magnesium and silicon [pic] c. iron and nickel d. nickel and silicon 7. A large ocean wave that is generated by vertical motions of the seafloor during an earthquake is called a(n) __________. a. upwelling current b. seiche [pic] c. tsunami d. tidal range 8.
As you finally reach the in entrance into the volcanoes, you will see rocks that are shape into oval shape and they are colored. Additionally, you may see yellow/brownish and on another side you may see red. You had just gone to Hawaii Volcanoes National Park. Hawaii Volcanoes National Park is one of the unforgettable parks there is in the United Stated. The park has actually real lava inside flowing around the park.