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The most reliable and widespread evidence found at the site are natural glass rocks called tektites.
Tektites form when a massive impact liquefies its target and sends melt into the atmosphere.
The Younger Dryas stadial, also referred to as the Big Freeze, was a geologically period of cold climatic conditions and drought that began in 10,800 BC (12,811 years ago).
In eastern Australia, there are megatsunami deposits with maximum run-ups of over 130 meters (426 feet) and a C-14 age of 1500 AD.
The Mahuika tektite field contains glassy tektites that appear orange, light green, and clear in visible light.
Tektites have been found over 220 km from the crater.
A collection of geologists have claimed the Big Freeze was caused by the collapse of the North American ice sheets, while others have supported the Younger Dryas impact hypothesis.
The impact hypothesis claims that a large air burst or impact event initiated the Younger Dryas cold period.