quick quiz 1.give an example of an continental island 2.name one of the three parts of a ridge. 3.an...
TRANSCRIPT
![Page 1: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/1.jpg)
QUICK QUIZ
1.Give an example of an Continental Island
2.Name one of the three parts of a Ridge.
3.An area of Subduction will form what type of structure in the ocean?
4.What is a flat topped Seamount called?
5.Long Island and England are what type of Islands?
![Page 2: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/2.jpg)
![Page 3: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/3.jpg)
Island Formation
• How do Islands form?
• Island Arcs- Philippines
• Hot spots---The Hawaiian Islands
• What does Darwin have to do with this?
• Atolls and Coral reefs
![Page 4: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/4.jpg)
1. Continental Islands = UK, New Zealand.2. Island arcs – Philippine & Aleutian Islands3. Volcanic Islands-
a. volcanic = Iceland, Hawaii, Azores, etc.
(1) along mid-ocean ridges, or(2) mid-basin “hot spots”.
b. coral - atolls(1) formed in warm, clear, tropical oceanic waters.(2) have volcanic bases.
![Page 5: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/5.jpg)
Continental Islands
• Large chuck of land breaks off of a continental land mass.
• Ireland, England were originally part of the European continent (fig 2.14 p 31)
• New Zealand was part of Australia
![Page 6: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/6.jpg)
Which Island can the Mid Atlantic Ridge be seen on land.
Irel
and
Icel
and
Fin
land
Gre
enla
nd
It c
annot b
e se
en o
n...
14%
71%
14%
0%0%
1. Ireland
2. Iceland
3. Finland
4. Greenland
5. It cannot be seen on land
![Page 7: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/7.jpg)
The three part of a ridge are the
Fla
nk, R
idge
and s
lope
Fla
nk, R
idge
Valle
y a.
.
Fla
nk, R
ift V
alle
y an
d...
Slo
pe, B
reak
and
Shel
f
0% 0%
100%
0%
1. Flank, Ridge and slope
2. Flank, Ridge Valley and Base
3. Flank, Rift Valley and Crest
4. Slope, Break and Shelf
![Page 8: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/8.jpg)
An example of Island Arcs created through subduction are
Icel
and
Haw
aiia
n Isla
nds
Man
hatta
n Is
land
The
Isla
nds o
f Jap
an
14%
29%
14%
43%1. Iceland
2. Hawaiian Islands
3. Manhattan Island
4. The Islands of Japan
![Page 9: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/9.jpg)
The most common geological structure in the ocean is
Abys
sal P
lain
s
Sea
mount
s
Guyo
ts
Abys
sal H
ills
25%
38%
13%
25%
1. Abyssal Plains
2. Seamounts
3. Guyots
4. Abyssal Hills
![Page 10: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/10.jpg)
![Page 11: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/11.jpg)
B. Island Arcs1. arc-shaped chains of islands (Marianas,Aleutians)2. usually on continent side of trenches.3. made by active volcanoes - explosive type.4. marginal basins
a. between arcs and continentsb. serve to trap sediment and block itfrom the deep sea.
Aleutian Islands
![Page 12: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/12.jpg)
Island Arc F
ormation
![Page 13: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/13.jpg)
Hot Spots-Volcanic Islands
• A volcanic “plume” at a fixed spot in the mantle pushes through the crust creating a volcano.
• The volcano builds becoming a seamount which crests the ocean surface.
• The crust moves over the spot and the process is repeated.
• This is why you will get Island Chains such as the Hawaiian Islands
![Page 14: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/14.jpg)
Hot Spot Formation
![Page 15: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/15.jpg)
![Page 16: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/16.jpg)
•
![Page 17: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/17.jpg)
![Page 18: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/18.jpg)
![Page 19: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/19.jpg)
![Page 20: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/20.jpg)
Volcanic Features
The Island Of
Hawaii
![Page 21: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/21.jpg)
![Page 22: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/22.jpg)
![Page 23: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/23.jpg)
![Page 24: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/24.jpg)
![Page 25: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/25.jpg)
![Page 26: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/26.jpg)
![Page 27: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/27.jpg)
![Page 28: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/28.jpg)
![Page 29: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/29.jpg)
Coral Reefs
• Tropical waters only (temperature matters)• 20 – 30 degrees C• Form in shallow water next to island• As island erodes, reef remains• Can only live in Photic zone- If the Island (Atoll)
sinks below the photic zone the coral will die.• Photic Zone is the upper layer of water where
light can penetrate.
![Page 30: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/30.jpg)
•Largest reef –Great Barrier Reef covers 80,000 square miles
![Page 31: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/31.jpg)
Charles Darwin
![Page 32: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/32.jpg)
Darwin
• In his voyage around the world in the 1830’s Darwin formulated his theory on reef and atoll formation
• This theory is still considered valid and is used to this day
![Page 33: QUICK QUIZ 1.Give an example of an Continental Island 2.Name one of the three parts of a Ridge. 3.An area of Subduction will form what type of structure](https://reader037.vdocuments.us/reader037/viewer/2022102907/56649ddf5503460f94ad8fc5/html5/thumbnails/33.jpg)
Life of a coral reef(as per Darwin)
Fringing reef
Barrier reef
Atoll