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Feb 18, 2023 · Exercise 1.4 – Interpreting Plate Boundaries from Topographic Profiles. Below are five topographic profiles showing different plate boundary configurations. A topographic profile is a graph that shows elevation changes as you walk from one point on the Earth to another. These are all made with vertical exaggeration (length/elevation) of 50:1.
- Fe, Mg, and Ca silicates
- 50%
- 3.0g/ cm 3
- 7-10 km
- Structure
- Boundaries
- Geology
- Formation
The outermost part of Earth's structure is known as the lithosphere. The lithosphere consists of the crust and small portion of the upper mantle. The lithosphere is divided into a number of tectonic plates. These plates move and interact with one another, driven by convectional forces within the Earth. The map at the top of this page shows the geog...
The edges of Earth's lithospheric plates have boundaries which are both well defined and poorly defined. Well-defined boundaries include mid-ocean ridges and ocean trenches. These boundaries are usually well enough defined that they can be plotted on a map at a reasonably accurate location. The boundary between the North America Plate and the Euras...
Mid-ocean ridges are divergent boundaries where convection currents in the mantle lift the ocean floor and produce a rift in the lithosphere that follows the crest of the ridge. New lithosphere is created by volcanic activity along the crest of the ridge, and the plates on either side of the ridge are moving away from one another.
Ocean trenches form where a plate with a leading edge of oceanic lithosphere collides with another plate. In these situations, an oceanic plate normally subducts into the mantle, forming a topographic low on the ocean floor. The point on the seafloor where the colliding plates are in contact is normally considered to be the geographic location of t...
Oct 1, 2023 · Below is a map showing the principle plate boundaries (Figure 1). Oceanic plates are basaltic in nature and are a few to 100 km thick. Continental plates, which are generally composed of granitic and andesitic rocks, are generally 100 to 150 km thick, but can be up to 250 km in thickness. Plates form the layer of the Earth known as the lithosphere.
The topographic map is a two-dimensional . representation of the Earth’s three-dimensional . landscape. The most frequently used Canadian topographic map is at the scale of 1:50 000. What information is on a topographic map? Topographic maps identify numerous ground . features, which can be grouped into the following . categories: Relief:
Mar 7, 2024 · A transform plate boundary occurs when two plates slide past each other, horizontally. A well-known transform plate boundary is the San Andreas Fault, which is responsible for many of California’s earthquakes. A single tectonic plate can have multiple types of plate boundaries with the other plates that surround it.
The two types of crust also differ in thickness, with continental crust being considerably thicker than oceanic (35 km vs. 6 km). The location where two plates meet is called a plate boundary. Plate boundaries are commonly associated with geological events such as earthquakes and the creation of topographic features such as mountains, volcanoes ...
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Jun 14, 2004 · The Earth's crust is constantly in motion. Sections of the crust, called plates, push against each other due to forces from the molten interior of the Earth. The areas where these plates collide often have increased volcanic and earthquake activity. These images show the locations of the plates and their boundaries in the Earth's crust. Convergent boundaries are areas where two plates are ...
