Middle Arg Fm

It is in all three Obisafit, Turkparidin, and Chakyklalyan type sections. O.I. Nikiporova (1949) described these deposits as the Arg suite (Argskyio tolshy??), noting the possibility of dividing it into lower layers with Amphipora and upper - with Pholidophyllum asiaticum and Parazyga argensis. In the scheme of the Silurian stratigraphy of Central Asia, accepted by the Tashkent meeting, after the revision of the MSC (Stratigraphy..., 1962), the Arg suite appears with two sub-suites, and the volume of the suite is increased due to the inclusion in it of the overlying limestones, described by O. I. Nikiforova (1949) as marginal layers. In this understanding, the Arg suite is now accepted by most researchers. At the same time, since the Kunjak horizon (marginal layers) is currently attributed to the Lower Devonian, it seems more convenient to divide the suite into three sub-suites, corresponding to the 'amphiporoid', 'pholidophyllid', and 'brachiopod' limestones in the scheme of V. R. Martyshev (1956).

Synonym: middle sub-suite of the Arg suite, Arg suite, Argskyio tolshy??

Reference section:

Gray and black limestones