“…The Cambrian thermal regime (Chumakov, 1984), confirmed by data on glauconite minerals, was similar to that of the Jurassic (Nikolaeva, 1981). According to these data, the temperature of seawater in Baltia was about 28 D C, and on the Siberian Platform and its Anabar-Sinsk Facies Region, about 30-38 D C. All the principal epicontinental basins were in low latitudes, as confirmed by paleomagnetic data obtained on fossiliferous sections in Australia, China, Mexico, and Mongolia, and on the East European and Siberian Platforms (Kirschvink, 1978;Khramov and Rodionov, 1980;Barr and Kirschvink, 1983;Zhang and Zhang, 1984;Kirschvink et 01., 1987). Therefore, the chief reason for increasing provincialism is, in our opinion, the fragmentation of the Paleopangea supercontinent (Kirschvink et 01., 1984).…”