Lecture_14 - SHOWS HIGH SEA LEVEL ABOUT SAME AS MODERN...

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LECTURE 14 - SHORELINES AND COASTAL PROCESSES 1.0 CHARACTERISTICS OF MICHIGAN’S SHORELINE LOWER PENINSULA - GENERALLY CONTINUOUS BEACHES UPPER PENINSULA - GENERALLY HEADLANDS AND BAYS 2.0 NATURE OF THE SHORELINE BEACH FACE BERM DUNE LONGSHORE BAR WAVE BASE = WAVE LENGTH 2 WAVE OF OSCILLATION WAVE OF TRANSITION (BREAKER) SPILLING AND PLUNGING 3.0 EROSION AND CURRENTS HEADLAND EROSION AND BAY INFILLING WAVE REFRACTION LITTORAL TRANSPORT OF SAND
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LONGSHORE CURRENTS RIP CURRENTS SURGES AND SEICHES 4.0 EROSIONAL LANDFORMS DROWNED VALLEY WAVE-CUT CLIFF WAVE-CUT PLATFORM (WAVE BASE) SEA CAVE SEA ARCH SEA STACK 5.0 SEDIMENT TRANSPORT AND DEPOSITIONAL LANDFORMS RIDGE AND RUNNEL DEVELOPMENT BAYMOUTH BAR BARRIER ISLAND BAY, LAGOON, ESTUARY TIDAL FLAT AND MARSH SPIT AND TOMBOLO 6.0 SHORELINE PROTECTION SEA WALL
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RIPRAP GROIN 7.0 SEA LEVEL RECORDS COMPLICATING FACTORS INCLUDE TECTONIC MOVEMENT, GLACIAL LOADING AND UNLOADING, MELTING OF GLACIER ICE SEA LEVEL RECORD OVER LAST 140,000 YEARS BASED ON ELEVATED CORAL TERRACES
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Unformatted text preview: SHOWS HIGH SEA LEVEL ABOUT SAME AS MODERN LEVEL ~120,000 YEARS AGO SHOWS SLOW DROP IN SEA LEVEL UNTIL MAXIMUM LOW ~20,000 YEARS AGO. MAXIMUM LOW ABOUT -130 M AND FOLLOWED BY SUDDEN RISE SEA LEVEL RECORD CORRESPONDS CLOSELY WITH MARINE OXYGEN ISOTOPE RECORD SEALEVEL RECORD OVER LAST 18,000 YEARS BASED ON RAISED BEACHES, SUBMERGED CORALS AND/OR SUBMERGED ORGANIC DEPOSITS SHOWS RAPID RISE IN SEA LEVEL ABOUT 20,000 TO ~6,000 TO 5,000 YEARS AGO AT RATE OF ~1.5-3 M PER 100 YEAR FROM SHOWS RELATIVE STABALIZATION OF SEA LEVEL SINCE ~6,000 to 5,000 YEARS AGO SEALEVEL CURRENTLY RISING AT ~ 0.3 M PER 100 YEARS 8.0 LAKE-LEVEL HISTORY OF LAKE MICHIGAN COMPLICATING FACTORS GLACIAL UNLOADING, EROSION OF OUTLET, CHANGING CLIMATE LAKE LEVEL HISTORY OF LAKE MICHIGAN OSSILATION OF 100 M OR MORE SINCE DEGLACIATION GENERAL DECLINE SINCE ~5,000 YEARS AGO OSSILATIONS OF AS MUCH AS 1.5 M SINCE 1865 NORTHERN END OF LAKE MICHIGAN CURRENTLY RISING WHILE SOUTHERN END CURRENTLY FALLING...
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This note was uploaded on 07/25/2008 for the course ISP 203A taught by Professor Larson during the Fall '08 term at Michigan State University.

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Lecture_14 - SHOWS HIGH SEA LEVEL ABOUT SAME AS MODERN...

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