Flashcards in Unit 4 Deck (26):
Between the high and low tide lines
Below the low line to approximately 200 m. This roughly corresponds to the Continental Shelf area
Between 200 and 2,000 m. This is rough;t the continental slope area
Greater than 2,000 m of water. This is the deep ocean floor.
Show the distribution of lithofacies for a time-rock unit.
Show thickness of time rock units
Used for constructed using the data found on lithofacies and isopach maps.
Depositional Zero Lines
In clastic sediments thick deposits near coarse clastics near the zero line generally indicates a depositional sedge. In carbonates look for indications of shore line
Erosional Zero Lines
Abrupt changes from marine facies to zero. Also a thining to zero within a single facies.
Primary means of describing the earth's surface in map view
Including streams,lakes and forests
roads, buildings and cemeteries are shown on topographic maps
What elevation is sea level
Every 5th contour
The difference in elevation between two adjacent contour lines
Do contour lines cross
No unless merged in a vertical or overhanging cliff
Do contour lines split
What do closed contours represent
Short lines that are perpendicular to the contour
What do closed contour with hachures represent
What is the contour "V" represent
Where do "v's" point?
Where do streams flow?
Step Slopes are represented by
closely spaced contour lines
"V" in uphill direction
cross stream or valley