The purpose of this paper is to
study the relationships between coherence, finite type extensions, and certain especial
orderings on the spectrum of a commutative integral domain R. Applications of the
techniques developed include a partial answer to a question of Vasconcelos concerning
the integral closure of a 1-dimensional, local, coherent domain, the existence and
construction of an interesting class of coherent domains that remain coherent under
polynomial adjunction, and new characterizations of domains previously defined
topologically.