topography of oceanic floor Flashcards
what are major relief features
1 continental shelf
2 continental slop
3 continental rise
4 depp sea plain /Abyssal Plain
what are major relief features of ocean
1 canyions
2 tenhches
3 MOR
4 attols
5 coral relief
6 gyots
6 seamounts
formation of continnetal shelf
land submerges
rise of sea level
sediments bought by rivers
Coral Growth: Coral reefs in tropical areas add to the shelf structure.
glaiated shels (greenland)
Tectonic Plate Movements: Formed at passive margins during continental drift and separation.
Wave and Current Erosion: Smoothens and shapes the shelf over time
which part of inida has larger continental shelfs
western cost
continental shelf are absent in which regions
where two plates sybmerged …fold mountains are formed
phytoplantons are found in
continental shelfs
largest continental shelfs
siberian shelf
dept of the continental shelfs
600 feet , 100 fatom
how much of the total petrolium production from the continental shelf
20%
what is photoic zone
continental shelf ..as the sunlight can reach there
angle of continental slope
2-5 %
dept of continental slope
600-3500 feet
200-3000 meter
canyons are present in which major feature
contnental slope
canyons - formed by erosion from rivers
largest canyon - colarado rivers
what is continental rise
The continental rise is a gently sloping region located between the continental slope and the abyssal plain,
what is abyssal plain
The abyssal plain is a vast, flat, and deep region of the ocean floor, typically found at depths of 3,000 to 6,000 meters. It is formed by the settling of fine sediments, such as clay and silt, and organic material, covering irregularities in the seafloor created by tectonic activity.
It is formed by the settling of fine sediments, such as
clay and silt, and organic material,
dept of abyssal plain
3000 -6000 meter
flatest region of the world
abyssal plain
what are minor oceanic relief feature
ridges
abyssal hills
seamount and guyots
treanches
canyons
island archs
atolls and coral relies
where mid oceanic redges found
abyssal plain
what are mid oceanic ridges
Mid-oceanic ridges are underwater mountain ranges formed at divergent plate boundaries due to magma rising, cooling, and creating new oceanic crust. Example: Mid-Atlantic Ridge.
countries made of mid oceanic ridges
greenland
iceland
what are ternches
Trenches are deep, narrow depressions in the ocean floor formed at subduction zones, where one tectonic plate is forced beneath another. They are the deepest parts of the ocean, such as the Mariana Trench.
largest trench
mariana trench
what is seamount
A seamount is an underwater volcanic mountain that rises from the ocean floor but does not reach the surface. Seamounts are often biodiversity hotspots and are formed by volcanic activity. Example: Emperor Seamount Chain in the Pacific Ocean.
waht are Guyots
Guyots are flat-topped seamounts formed when a volcanic island erodes and subsides below sea level. The flat top is created by wave erosion when the island was above water.
what are Volcanic Island
A volcanic island forms when underwater volcanic activity builds up enough lava and debris to rise above the sea level.
Example: Hawaii Islands.
what are Atolls
Atolls are ring-shaped coral reefs that encircle a central lagoon, often formed around a sinking volcanic island. As the island subsides, coral continues to grow upward, maintaining the atoll structure above sea level. Example: Maldives Atolls.
