Post on 07-Jan-2016
description
Stream DrainagePatterns
Start by reading the first page of
the notes!
THE BEDROCK OF IN AN AREA WILL CAUSE STREAMS TO DRAIN IN A
PATTERN
THAT CAN BE SEEN FROMOVER-HEAD (airplane).THESE ARE CALLED
Mississippi River Delta
C.
Match the geologic structures below
To the drainage patterns they would create.
THIS OCCURS WHEN:
Rock resistance is all similar
• Like the veins in a leaf
• Horizontal rock layers
• Most common
WATER FLOWS DOWN HILLFOLLOWING THE PATH OF
LEAST RESISTANCE
C.
THIS OCCURS IN THE AREA OF A STRUCTURAL DOME
WATER FLOWS IN THE PATH OFLEAST RESISTANCE
with rock layers of variable resistance surrounding the center of the dome
FOLLOWING THE PATH OF LEAST RESISTANCE
STAGES IN LANDSCAPE DEVELOPMENT:
THE MATURITY OF A LANDSCAPE DEPENDS UPON THE PORTION OF THE LAND THAT HAS BEEN WORN DOWN TO OR NEAR
BASE LEVEL (NOT SEA LEVEL)
THE 3 STAGES OF LANDSCAPE MATURITY:
1.MUCH OF THE LAND AT HIGH ELEVATIONS2. STEEP HILL SLOPES3. FAST STREAMS4. DEEP V-SHAPED VALLEYS
1. ROUNDED HILL SLOPES (IF MOIST CLIMATE)
2. STREAM VALLEYS ARE BROAD3. STREAMS BEGIN TO MEANDER
1. MOSTLY ERODED TO BASE LEVEL2. STREAMS HAVE LOW SLOPE (GRADIENT)
3. STREAMS MOVE SLOW & MEANDER4. FERTILE AND THICK SOIL HORIZON A
CAN CAUSE OLD LANDSCAPES TO
BEREJUVINATED
BACK TOYOUNG AGAIN
UPLIFT
ENVIRONMENTAL PLANNING AND CONSERVATION CAN HELP TO PRESERVE OUR
SOIL,WATER,AND AIR
Notice how the rock types
weather differently
Which rock is least resistant?
shale
Differences in rock resistance creates varied
and interesting landscapes.
THE INFLUENCE OF CLIMATE ON LANDSCAPE:
Humid (moist) Arrid (dry)Slope
Soil
Type ofWeathering
gentleFertileThick A layerChemical due to
Increased amount Of moisture
steep
rockyPhysical due to
abrasion