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Blue Holes

Deep water caverns that preserve the past.

Ashlea Giblin

on 14 April 2011

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Transcript of Blue Holes

Blue Holes Veronica Osorio Vindetta IN FOSSIL RECOVERY... Blue holes are extremely
important to archeologists because of their low oxygen levels. Without oxygen in the water, bones are perfectly preserved. Mark T. White Blue Holes were... Formed when sea levels dropped and allowed rain to wash away the earth.
Then seas rose, and the new formations were filled with water.
The mixture of salt water from the ocean and fresh water from the rain created a chemical reaction called a halocline.
This would eat away rock and form other caverns. Remains of tortoises and crocodiles
Human bones that may be the first-known Bahamian young person who lived some 1,050 years ago.
Owl vomit that contains... It is called the “Blue Hole” because of the striking indigo blue color of the deep hole in comparison to the lighter shades of green and blue of the surrounding lagoons. Why a blue hole? Following the guideline her life depends on, a diver threads the needle through a stalagmite forest in Dan's Cave on Abaco Island. A single, misplaced fin kick can shatter mineral formations tens of thousands of years old.
Bacteria color the water at a depth of 30 to 36 feet in Sawmill Sink on Abaco. Here and in a colorless layer below, poisonous hydrogen sulfide gas is present. Divers move through it with all deliberate speed.
In lightless blue holes, animals like this inch-long Agostocaris cave shrimp don't need surface pigmentation. Only part of the shrimp's digestive system has color.

There is life here! The remipede is a "living fossil" nearly unchanged for 300 million years. It kills its prey, primarily other crustaceans such as cave shrimps, with venom-injecting fangs. Archaeologist Michael Pateman lifts a centuries-old Lucayan Indian skull from a gridded site 110 feet down in Sanctuary Blue Hole on Andros Island. Amid a hanging forest of stalactites in Ralph's Cave on Abaco, Brian Kakuk shines his dive light on a translucent stalagmite. During periods of lower sea level, when caves were dry, stalagmites and stalactites grew and eventually joined to form columns. Blue holes are beautiful, ominous, helpful and essential to marine archaebiologists.
Show the past in a helpful time capsule.
In using the deep water caverns, we have discovered many things about ancient life in the Bahamas... Nancy Albury Wes C. Skiles Wes C. Skiles Wes C. Skiles Wes C. Skiles Wes C. Skiles Wes C. Skiles VanCott, Rachel, “Creatures of Underwater Caves”PBS network, 1 Feb 2010.

Barrat, James. "Risking It All for Science." (2010): 1. Web. 14 Apr 2011. <http://www.pbs.org/wgbh/nova/earth/risky-science.html>.

Morgan, Curtis. "Blue holes a mystery of the deep." McClatchy-Tribune Information Services (2010): 1. Web. 14 Apr 2011. <http://www.physorg.com/news205158392.html>. The deep underwater cave, known as Sawmill Sink, is filled with a treasure trove of well-preserved fossils, including... lizards
birds most of the animals they have found are globally or locally extinct species
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