Ngorongoro is thought to have formed about 2.5 million years ago from a large active
volcano whose cone collapsed inward after a major eruption, leaving the present vast,
unbroken caldera as its chief remnant. The caldera's floor is predominantly open grassland.
It is a large, unbroken, un-flooded caldera, formed when a giant volcano exploded and collapsed
some three million years ago. The Ngorongoro crater sinks to a depth of 610 metres, with a base
area covering 260 square kilometres.
The Ngorongoro Conservation Area (NCA) is a protected area and a World Heritage Site located 180 km (110 mi) west of Arusha in the Crater Highlands area of Tanzania. The area is named after Ngorongoro Crater, a large volcanic caldera within the area.
A part of the larger Ngorongoro Conservation Area, one of three natural UNESCO World Heritage Sites found in Tanzania, the Crater is the remnant of a mighty volcano that collapsed inward upon itself after a mighty eruption between 2 and 3 million years ago.
Interactive Map of Serengeti, Ngorongoro and Lake Manyara. The Ngorongoro Crater, once a gigantic volcano, is the largest intact caldera in the world. ... Today, long since having collapsed and eroded, it is an extensive highland area with the famous 600-meter-deep Ngorongoro Crater as its focal point.