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Green Banana Hole facts for kids

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Green Banana Hole
Location Sarasota, Florida
Depth 130 m (427 ft)
Elevation -47 m (154 ft)
Features One of the deepest blue holes known
Cave survey 2020-21

The Green Banana Hole is a blue hole 80 km (50 mi) off the coast southwest of Sarasota, Florida. The rim is approximately 47 m (154 ft) below the surface and the hole extends downward approximately 130 m (427 ft). Blue holes in this area are thought to have formed as sinkholes on land 8,000 to 12,000 years ago. Due to lower sea levels at this time, the Florida coastline extended approximately 161 km (100 mi) farther into the ocean. The vertical shape of the hole is roughly like an hourglass, making it especially difficult to explore. It is one of the deepest known blue holes.

Etymology

The name Green Banana was reported to come from the captain of a commercial fishing boat who, while fishing in the area of the hole, saw a green banana skin floating in the water.

Exploration

In August 2020 the hole was explored by diver Marty Watson and a team of scientists from Florida Atlantic University. In May 2021 scientists from NOAA, Mote Marine Laboratory, and other regional scientific organizations plan to conduct a research expedition to the site where divers and crew using specially designed instruments will explore the hole. Scientists and engineers have built an instrument package called a benthic lander. The lander is a triangular-shaped prism that will be lowered into the hole and will have the expedition's instruments mounted inside. The researchers plan to gather data about the structure of the hole as well as information about seawater chemistry and marine life inside the hole. The team also hopes to gather information about possible connection(s) between the many blue holes that exist off the coast of Florida and the Floridan aquifer system. This expedition is part of a three-year study and builds on the information and experience gathered from an earlier expedition to Amberjack Hole.

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