Permian climate of the Sydney Basin -- cold or hot?

The concept of a frigid to glacial climate prevailing in the Sydney Basin throughout most of the Permian has received general acceptance.Yet, on the basis of mineral composition of the strata, this conclusion is difficult to substantiate.Indeed, from the evidence available it would appear more likely that humid, warm to hot conditions, favourable for the development of kaolinite and in part bauxitic clayrocks, persisted at least intermittently from the earliest Permian through almost to the Middle Jurassic.