Can you outline the cosmological sequence of creation that emerges from Brahman?

Certainly. The process begins when Brahman, originally beyond the senses, becomes qualified by Avidya (ignorance) and thus becomes expressible as 'Sat' (Existence). As Chapter 50 details, from this expressible Brahman, the Unmanifest (Avyakta) emerged. The sequence continues with the Great Principle (Mahat-tattva) arising from the Unmanifest. Egoism was born within the Great Principle, and from egoism came the five Tanmatras (subtle elements). Within these, the five great elements were formed, and from them, the entire world was born.