Outstanding universal values of the Lena Pillars Nature park. Those who have ever visited the mid-Lena river area in the Sakha Repulic (Yakutia), eastern Russia, are familiar with the grandiose Lena Pillars. Not far from them the Earth’s most ancient Oymuran reef is located. Here and in some other prehistoric natural sites of the Lena Pillars Nature Park mass appearance of many groups of skeletal marine animals first occurred on Earth more than 530 million years ago. The book, for the first time, most fully substantiates the outstanding universal value of these geological – geomorphological and paleontological objects. The book is intended for pupils, students, teachers, ecologists, those who study local lore, as well as for broad sections of interested readers. 17 figs., 5 plates, 37 color photos, 403 references.