The Huitberg limestone outcrop
The limestone outcrop is one of the oldest coral reef structures in the bedrock of Estonia. The bioherm from durable Ordovician limestone that has an oval layout of about 500 m2 has gone through the abrasion of the last Ice Age and is rising 2.5 metres higher from the surrounding flat area. The bioherm has an abundant amount of fossils. Fossilized corals can be seen in spots free from moss, predominantly tabulates and tetracoralla, stromatoporoids can be found, less commonly the brachiopods and a few bryozoans. All of these animals lived in a tropical warm shallow sea during the Ordovician era more than 400 million years ago.