A 550-ton spherical piece of nickel-iron metallic meteorite was found below the crater. The 1-cm-thick clay layer that marks the Cretaceous/Tertiary (K/T) boundary has a high percentage of the element __________ in the clay layer, an enrichment about 300 times greater than the normal abundance.

The youngest impact crater on Earth is Carancas impact crater in Peru – this 13.5 m wide crater formed in the 15th September 2007. The largest impact crater in modern times (last centuries) could be Wabar craters (Saudi Arabia) – the largest crater is 116 m wide. Most likely these craters formed in September 1704.

The largest known stony-iron meteorites are two fragments of the Brenham meteorite found near Haviland, Kansas (and which are possibly associated with an impact crater near there); these have masses of 650 kg and 450 kg. The largest stony meteorite known is apparently a 654-kg fragment of the Chelyabinsk meteorite that fell near Chelyabinsk
The Hoba meteorite in Namibia is the largest-known single meteorite piece on Earth. A farmer discovered the gigantic iron mass while plowing his field in the early 1900s. It was soon excavated and Crater Crater diameter Body diameter Ratio Images Notes Mercury: Caloris: 1,550 km (963 mi) 4880 km 32% Rembrandt: 715 km (444 mi) 15% Venus: Mead: 280 km (170 mi) 12100 km 2% Earth: Vredefort: 250–300 km (160–190 mi) 12740 km 2% Chicxulub crater: 182 km (113 mi) 1.4% Cause of the Cretaceous–Paleogene extinction event: Sudbury Basin: 130
The Vredefort impact structure is one of the largest verified impact structures on Earth. The crater, which has since been eroded away, has been estimated at 170–300 kilometres (110–190 mi) across when it was formed.
An excellent example of a crater produced by this type of impact is the geologically young (50,000 year old) Meteor Crater in northern Arizona. This crater is 1.25 kilometers (4,100 feet) across, 170 meters (560 feet) deep (that of an approximately 60 story building), and has a circumference of nearly 5 kilometers (over 3 miles).
Tomanowos is over 30,000 pounds, making it the largest meteorite found in North America and the sixth-largest in the world. Comprised of iron and nickel, scientists think it may have formed when a
This is one of the single largest confirmed asteroid impact craters anywhere on Earth, possibly dwarfed only by the 300-kilometer-wide Vredefort impact crater in South Africa, and is one of the
List of impact craters in North America. This list includes all 60 confirmed impact craters in North America in the Earth Impact Database (EID). These features were caused by the collision of large meteorites or comets with the Earth. For eroded or buried craters, the stated diameter typically refers to an estimate of original rim diameter, and
3 – Vredefort Crater, South Africa (118 Mile Diameter) Wiki Info: The Vredefort crater is the largest verified impact crater on Earth, more than 300 km across when it was formed. What remains of it is located in the present-day Free State Province of South Africa and named after the town of Vredefort, which is situated near its centre.
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    • largest meteorite crater on earth