This work is devoted to experimental methods for producing calcium-phosphorus compounds, including calcium hydroxyapatite, using microwave radiation. Two types of synthesis were used: template method and chemical precipitation. During synthesis, the heating time and power were changed. The obtained samples were studied using scanning electron microscopy, X-ray diffraction analysis, and the BET (Brunauer-Emmett-Teller) sorption method.

The paper presents the results of studying the geological structure of the Ludlowian boundary sediments and data on lithology, bio-and chemostratigraphy, and large-scale biotic reconstruction at the boundary Ludlow-Pridoli. The results obtained make it possible to draw a conclusion about the stratigraphic incompleteness of the Ludlow section in the Subpolar Urals and the interruption in sedimentation at the end of the Ludlow.

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Îïîðíûé ðàçðåç ñèëóðà çàïàäíîãî ñêëîíà Ïðèïîëÿðíîãî Óðàëà âñêðûò â îáíàaeåíèè 236 íà ð. Êîaeûì.  íàñòîÿùåé ñòàòüå äàíà ëèòîëîãè÷åñêàÿ õàðàêòåðèñòèêà ïîðîä ñèçèìñêîãî ãîðèçîíòà âåðõíåãî ëóäëîâà îáíàaeåíèÿ 236 â áàññåéíå ð. Êîaeûì. Ïîêàçàíî, ÷òî â îáðàçîâàíèè èçâåñòíÿêîâ è äîëîìèòîâ çíà÷èòåëüíóþ ðîëü èãðàëè ðàçëè÷íûå áåíòîñíûå îðãàíèçìû, â òîì ÷èñëå öèàíîáàêòåðèè, ñôîðìèðîâàâøèå ñòðîìàòîëèòîâûå ïîñòðîéêè â êðàéíå ìåëêîâîäíûõ óñëîâèÿõ â ëóäëîâñêîå âðåìÿ.