Mars Student Imaging Program The Three Principles Impact Craters Features you must know and...
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Transcript of Mars Student Imaging Program The Three Principles Impact Craters Features you must know and...
Mars Student Imaging Program
The Three Principles
Impact Craters
Features you must know and understand.
Ejecta – Material, from the crater, that was thrown high into the air and landed outside the crater in a blanket.
Mars Student Imaging Program
The Three Principles
Impact Craters
Features you must know and understand.
Rim – The raised area around the edge of the crater.
Peak – An impact violent enough to melt the rock which formed a central uplift.
Mars Student Imaging Program
The Three Principles
Impact Craters
Features you must know and understand.
Walls – The crater slope down to the floor.Floor – The bottom of the crater; it usually is flat.
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.
Ejecta
PeakRim
Floo
rWall
Impact Craters
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.Volcanoes
Lava – Hot, molten rock.
Vent – Crack(s) in the planet’s crust.
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.Volcanoes
Caldera – A roughly circular depression found at the top of the volcano.
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.Volcanoes
Shield – Domes much wider than they are high (shaped like a shield) and have very low slopes.
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.Volcanoes
Shield
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.Stratification – Layers of rock that are laid on top of the previous layer.
Mars Student Imaging Program
The Three PrinciplesFeatures you must know and understand.River Beds – Long, snake-like formations that resemble dry river beds similar to those found on Earth.
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The Principle of Superposition
Strata located at the bottom of an undisturbed stack of rocks are older than the layers at the top of the stack.
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The Principle of Cross-Cutting RelationshipsRocks or geological features such as canyons, rivers, or cracks in rocks, may be cut by other rocks or by other geological features.
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The Principle of Cross-Cutting Relationships
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The Principle of Cross-Cutting RelationshipsThe rocks are the oldest feature, followed by the river, and then the canyon “cut” by the river.
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The Principle of Horizontal Bedding
Rocks that are deposited by water, such aslimestone, or rocks that are deposited by wind, such as sandstone, are deposited in nearly horizontal layers.
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The Principle of Horizontal Bedding
If the layers are no longer horizontal, they must have been bent or folded after they were originally laid down.
Mars Student Imaging Program
The Three PrinciplesThe Three Principles
The presentation ends here.