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Karst
is a term that was first applied to a plateau region of the Dinaric Alps in Yugoslavia. It is now used to
describe similar regions throughout the world that have features formed
largely by underground drainage. Karst terrains are
characterized by caves, steep valleys, sinkholes, and a general lack of
surface streams because drainage is underground. A consequence of this is not
only a very interesting landscape (caves have fascinated people for millennia)
with unusual habitats for plants and animals, but special problems in water
supply, waste disposal, construction, and other land uses.
What
does this have to do with Michigan,
a land literally scoured by glaciers, a land covered with glacial clay, sand
and gravel? Surprisingly, Michigan
contains some areas of true karst. They are limited
in extent, but this rarity increases their interest and importance. There is
also considerable variety in Michigan karst areas: gypsum
karst is found in Kent and Iosco counties; a significant
amount of surface drainage goes underground in Monroe County, and reappears
at "blue holes" in Lake Erie; spectacular sinkholes and earth
cracks are found in Alpena and Presque Isle counties; and the broad band of
outcrops of the Niagara Escarpment in the Upper Peninsula hosts a number of karst sinks, springs and caves.
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Calcium Carbonate - Deposited by
water filtering through upper soil to grow formations
Cave Pearls - small spherical
calcite deposites usually found in pools
Columns - a Stalactite and
Stalagmite that have joined to form one continous
formation
Curtains/Drapery/Cave Bacon - thin sheets of wavey stalactites.
Flowstone - deposited by
sheets of water gently washing over cave walls and floors
Grotto - A small cave (the
official NSS name given to a caving chapter or club)
Rimstone Dams - stair-stepped
pools made by cascading waterfalls
Soda Straws - approx. 1/4"
diameter hollow stalactites
Stalactites - forms from
ceiling down (Hang "Tight" from one)
Stalagmites - forms from floor
up
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Belly Crawls - Passages from
about 10 inches to 2 feet in height that require a lot of squirming.
Breakdown - Areas where the ceiling has collapsed covering the floor
with mounds of debris that need to be scrambled over. Avoid if unstable.
Cave Walking - Passages 4 to 6 feet high walked with some stooping
Chimmney - vertical shafts 2 to 3
feet in diameter that can be climbed when you wedge yourself with your back
against one side and your knees against the other.
Crawling - Passages 2 to 4 feet tall where you're usually on all fours
Scramble - When a passage is too steep to walk but not steep enough to
require rock climbing techniques (generally less than 45 degrees). It
includes walking, climbing, sliding, bridging and jamming meneuvers.
Squeeze - Short spots where sucking in your stomach is required to
make yourself thinner
Sump - A passage that continues underwater
Tight Squeeze - Short spots where exhaling and compressing your ribs
is required to make yourself even thinner
Twilight Zone - That area just inside the mouth of the cave where life
forms transition from those that live partially outside of the cave and those
that live exclusively inside.
Walkway - Nearly horizontal standing room passages
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Sturdy
boots with good tread and ankle support. Gym shoes tend to be too slippery in
the mud. Jungle Boots have vents to let any water out.
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Climbing helmet,
Hard hat or Bicycle helmet with chinstrap. Hard Hat
rims can be cut back for better sight distance.
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Three (3)
sources of light for backup;
(ie. carbide lamp, electric headlamp, flashlight, candle, glowstick) Primary
light source securely mounted to helmet Coveralls or old jeans
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Warm
Sweatshirt or Flannel Shirt
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Shoulder
pack/Book Bag/Small Back Pack
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Gatorade
or canteen of water
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Foodin watertight container
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Extra
batteries, bulbs, matches and carbide in watertight container (carbide lamp
repair kits are avaliable)
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Baggie w/
popsicle stick to clean and store spent carbide (Leave baggie slightly open to
allow residual gas release)
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Gloves,
knee pads, pocket knife
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Full change
of clothes and extra shoes for ride back
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Plastic
Garbage bag for muddy cave clothes
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Small
personal First Aid kit/Space blanket/Medications
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Compass,
waterproof notebook and pencil
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