• Type: Iron meteorite / octahedrite IAB
• Location: Saaremaa, Estonia
• Weight: 5.6g
• Size: 34 x 22 x 1 mm
• Year of discovery: 1937
• Known total weight: 2.25 kg
• Surface treatment: cut, polished slice
• DETAILED DESCRIPTION

The Kaalijärv meteorite and the best-preserved impact crater in Northern Europe The Kaalijärv meteorite, an iron body estimated to weigh between 20 and 80 tons, entered the Earth's atmosphere thousands of years ago and caused one of the most powerful impacts in Northern Europe. It was an IAB type meteorite composed mainly of metallic iron and nickel. Due to its high mass and speed, it did not completely disintegrate in the atmosphere – the body reached the Earth's surface, releasing a large amount of kinetic energy upon impact. The meteorite impact created a series of craters, the largest of which, known today as the Kaali Main Crater, has a diameter of about 110 meters and a depth of about 22 meters. Within a radius of about 1 kilometer, there are eight smaller craters, likely formed due to the fragmentation of the meteorite shortly before impact. The impact energy was equivalent to the explosion of several thousand tons of TNT, causing immediate destruction of the forest cover in the surrounding area. Age of impact Estimates of the event's age vary slightly. Radiocarbon dating of organic remains in the ejecta of the main crater indicates that the impact occurred around 1500 BC, while other geological studies place the event between 4000 and 7000 years ago. The differences in dating stem from the various methods and materials analyzed (carbon vs. sediments vs. shells). Archaeological significance Evidence of human presence at the time of impact is significant. Archaeological findings show that the crater was surrounded by a stone wall in prehistoric times and was likely used for ritual or symbolic purposes. The presence of human activity shortly after the impact suggests that people witnessed the event or incorporated its consequences into their culture. Current status of the site Today the area is protected as part of the Kaali Landscape Conservation Area and is open to the public. The main crater is partially filled with water and functions as a lake. The site is considered one of the most significant meteorite structures in Europe.