A relatively complete section of the Maikop Group (Oligocene – lower Miocene) is exposed along the Sulak River valley in Dagestan (NE Caucasus) and contains a depositional record for this part of the Eastern Paratethys. At the Sulak River outcrop, the Maikop Group is ca. 1200 m thick and can be divided into six lithologically-defined formations: these are from the base up the Khadum Formation (Rupelian), the Miatly Formation, the Lower Clayey Formation, the Mutsidakal Formation (Chattian), the Riki Formation and the Zuramakent Formation (lower Miocene). The Khadum Formation rests on the upper Eocene Belaya Glina Formation and the boundary is marked by a sharp lithological transition from pale-coloured, bioturbated limestones below to black organic-rich shales above.

中文翻译：

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高加索达吉斯坦的渐新世 - 下中新世迈科普群的地层、沉积学和地球化学

Maikop 群的一个相对完整的部分（渐新世 - 下中新世）沿着达吉斯坦（高加索东北部）的 Sulak 河谷出露，其中包含东帕特提斯山脉这部分的沉积记录。在 Sulak 河露头处，Maikop Group 大约位于 1200 m 厚，可分为六个岩性定义的地层：这些是从底部向上的 Khadum 组（Rupelian）、Miatly 组、下 Clayey 组、Mutsidakal 组（Chattian）、Riki 组和 Zuramakent 组（下中新世）。Khadum 组位于上始新世 Belaya Glina 组之上，边界以从下方的浅色生物扰动石灰岩到上方黑色富含有机质页岩的急剧岩性转变为标志。