![]() ![]() ![]() The cave is still forming today as water moves downward through these large and small passages to reach the water table, and underground rivers continue to flow out of the cave and into the Green River. ![]() These consist of four fossil levels and the modern river level, which is the lowest level located over 300 feet beneath the surface. There are currently five distinct “levels” of passageways within Mammoth Cave. The highest passages formed until about 2 million years ago, when research speculates that ice age activity altered the amount of water flowing into the cave and the remaining cave streams descended to lower levels of the cave. However, the passages of Mammoth Cave did not start forming until about 10 – 15 million years ago, when streams and rivers that were flowing over the surface allowed water to sink in and enter the rock beds through small cracks. The rock beds formed about 320 – 360 million years ago. He gives Tim a key, which opens his stepfather’s trunk. When Barony Coventer rides into town on his black horse, he causes more trouble than the demand for payment. ![]() Researchers have dated Mammoth Cave’s rock beds to the Mississippian Period. The Wind Through the Keyhole’s essence is a narrative about a young boy who must deal with his father’s death, financial hardship, an abusive stepfather, and his mother’s blindness. River Styx, one of the underground rivers, is illuminated by flashlights. ![]()
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