Nalinkala Fm

The type section is located at Nalinkala, south of Burqi County, Xinjiang. It was named by the No. 3 Regional Geological Survey Party of Xinjiang Bureau of Geology in 1960, and formally cited in The Paleozoic Erathem of Xinjiang in 1991.

Siltstone, Sandstone. Dominated by gray clayey siltstone, siltstone, calcareous sandstone, feldspar-rich sandstone, siliceous siltstone, intercalated with carbonaceous-clayey siltstone, sandy limestone, carbonaceous shale and coal seams, locally with conglomerate, greywacke and pebbly greywacke. Lithologic variation is not great, being dominated by normal clastic rock, with minor tuffaceous matter in local segments. Thickness varies greatly, from 214 m to 1281 m eastward.

Generally containing Ammonoids Beyrichoceras sp., Michelinoceras sp. and Prolecanites cf. serpentinus; Corals Caninia sp., Cryptophyllum cf. hibernicum, Zaphrentites sp., Lophophyllum sp., Carcinophyllum sp. and Rotiphyllum sp., Brachiopod Dictyoclostus sp., as well as Plants Archaeocalamites sp., Mesocalamites sp., etc. The clastic rock of the lower subformation marine contains Ammonoids, corals and plant fossils, and the continental coal-bearing bed of the upper subformation contains Angara flora.

It is interpreted as a littoral-continental facies