Krish Arora- GOL 105 Plate Tectonics Lab 2020 revision
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Northern Virginia Community College *
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105
Subject
Geology
Date
Apr 3, 2024
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docx
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Uploaded by AmbassadorTankHummingbird13
Name Krish Arora
GOL 105: Physical Geology
Plate Tectonics Lab (2020 revision)
Maps to use:
This Dynamic Planet (USGS publications)
- http://pubs.usgs.gov/imap/2800/
A Global Map/Atlas – The National Geographic Map below can be used or an equivalent one that includes geographic and sea floor features. https://mapmaker.nationalgeographic.org/#/
Please save this document
on your computer with a file name including your name before entering your answers into the tables provided, then save your copy & submit it via Canvas.
Directions: Please identify several examples of each of the following plate tectonic settings using the maps referenced above. Please read the legend at the bottom of the This Dynamic Planet Map which explains the symbols used on the map. For each example, provide a geographic name for the setting (
e.g
., the Andes Mountains, the Mid-Atlantic Ridge, etc
.) and identify the tectonic plate(s) that are involved. The plate names are identified on the This Dynamic Planet
Map. The
This Dynamic Planet Map does not provide the names of associated geologic features. To find these you will need to use an atlas. Several geographic atlases can be found online (The link above is for the global atlas from National Geographic), or you can use one that you may have access to at your home. Be sure you find an atlas that contains the geographic names of the ocean floor features in addition to the geographic names of land features. Some features may have more than one geographic feature associated with them. For instance, an ocean-
continent convergent boundary can be identified by the deep-sea trench or by the continental
volcanic arc. You will only need to identify each setting with one prominent geographic feature, but listing more than one will be useful for you.
Finally, list the general geologic phenomena or features that are typically associated with each
type of plate tectonic features. These can include the following:
small shallow earthquakes
large deep earthquakes
volcanoes (volcanic island arcs, continental volcanic arcs, or hot spot volcanic tracks)
deep sea trenches
oceanic ridges (spreading centers)
continental mountain ranges (non-volcanic)
Don’t list specific place names
or landscape features (like “Mount St. Helens”) – the goal here is to see what all the examples of this particular type of boundary have in common (like “deep earthquakes, volcanic island arcs, and deep sea trenches”).
Divergent Boundaries:
Identify five (5) different divergent plate boundaries (spreading centers) on the earth. What general geologic features/phenomena (
i.e
., earthquakes, volcanoes, trenches, mountains, etc.) are associated with this boundary? Be careful, not all features labeled “ridge” on the map are tectonic spreading centers.
Name
Plates Involved
San Andres Fault Pacific Plate, North America Plate Great Rift Valley
Somalian Plate, Nubian Plate
Red sea rift Arabian plate, African plate East African rift
Somalian plate, Nubian plate
Mid-Atlantic ridge
North America plate, south America plate Africa plate Geologic Features/Phenomena
Volcanoes
Mountains
Earthquakes Oceanic ridges rifts
Convergent Boundaries:
Ocean-Ocean
Identify three (3) different ocean-ocean convergent boundaries. Be sure to indicate which two plates are involved in the collision, and which plate is being subducted. What general geologic features/phenomena are associated with this boundary?
Name
Plates Involved
Aleutian Islands Pacific Plate and North American Plate
The Japanese Islands Pacific plate and Philippine sea plate The Caribbean Islands South American plate and Caribbean plate Geologic Features/Phenomena
Volcanoes Volcanic arcs
Mountains Island arches
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Ocean-Continent
Identify three (3) different ocean-continent convergent boundaries. Be sure to indicate which two plates are involved in the collision, and which plate is being subducted. What general geologic features/phenomena are associated with this boundary?
Name
Plates Involved
Andres Mountain Range Nazca Plate and south American plate Honshu
Pacific plate and Okhotsk plate Cascade Mountain range Juan de fuca and north American plate Geologic Features/Phenomena
volcanoes
Mountains Mountain ranges
Continent-Continent
Identify at least one (1) continent-continent convergent boundary. Be sure to indicate
which two plates are involved in the collision. What geologic features/phenomena are
associated with this boundary?
Name
Plates Involved
Himalayan Mountain Indian and Eurasian plates
Geologic Features/Phenomena
Earthquakes Mountains
Transform Boundaries:
Identify four (4) different transform faults on the surface of the Earth. What geologic features/phenomena are associated with this boundary?
Name
Plates Involved
San Andres Fault
North American Plate and Pacific Plate
Mid Atlantic Fault
North American Plate and South American plate Alpine Fault
Australian and Pacific Plate Geologic Features/Phenomena
Earthquakes
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Hot Spots:
Identify five (4) active
hot spots on the surface of the Earth. What geologic features/phenomena are associated with this boundary?
Name
Plate Involved
Mount Etna African Plate
Marion
Antarctic Plate
Icelandic Hotspot
Eurasian and North American Plates
Lord Howe
Australian Plate
Geologic Features/Phenomena
Volcanoes Deep Sea Trenches Vents
Mountains
You can determine if an ocean basin is getting bigger
or smaller
through time by estimating the percentage of its perimeter that is composed of deep-sea trenches. If more than half the perimeter (>50%) is composed of deep-sea trenches, it is likely that the ocean basin is currently getting smaller
over time. If less than half the perimeter (<50%) is composed of deep-sea trenches, the ocean is likely getting bigger
over time. Identify whether each of the following oceans or seas is getting bigger
or smaller
through time:
Atlantic Ocean Bigger
Pacific Ocean Smaller
Indian Ocean Bigger
Red Sea Bigger
Arctic Ocean Smaller