We present new results of investigation of Middle Miocene Badenian tuffite levels exposed in Southern Poland within the Gdow embayment area (tuffites from Wiatowice, upper part of the Skawina Beds, foraminiferal biozone IIg) and compare them with the well known and extensively described Bochnia Tuffite level at Chodenice near Bochnia (upper part of the Chodenice Beds, foraminiferal biozone IIIA). The 40 Ar/39 Ar ages of the glass separates obtained from these layers were determined applying (standard) incremental heating techniques the Wiatowice and Bochnia tuffites have been dated to be 13.76 +/-0.08 Ma, and 13.62 +/-0.10 Ma old, respectively.
The Salt Range Formation in northern Pakistan is globally well-known for its extremely large evaporite deposits dated to the upper Ediacaran–lower Cambrian. This huge evaporite belt formed an area covering present-day parts of India, Pakistan, Iran, Oman, and even South China (~200,000 km2 in South China). Sulphate minerals, including anhydrite and gypsum, can continuously record seawater sulphur isotopic composition. Until now, there was only one dataset reporting the isotopic composition of evaporites in Pakistan. This study reports new data, which points to a strongly positive sulphur isotopic shift (>+30‰, VCDT values) in the Salt Range Formation in Pakistan. Based on the stratigraphic position, similarity in lithology, age, and sulphur isotope data of the evaporitic sequences, it can be inferred that the Neoproterozoic Indo-Pakistan Plate and the Yangtze Platform were closely related palaeogeographically during the terminal Neoproterozoic. This interpretation can improve understanding of the palaeogeographical evolution of the area during the Neoproterozoic, with particular reference to the origin of biogeochemical cycles and the diagenetic evolution of the evaporitic deposits
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