Thursday, June 23, 2016

A Look Back…50 Years: Muddy Belize Models

A half century ago, Matthews bemoaned that fine-grained carbonate sediment had been neglected, except in the Bahamas. To rectify this situation, he examined mineralogy of carbonate mud offshore of present-day Belize, and found aragonite (as in the Bahamas), but with an “unusual abundance of” high-Mg calcite, in many cases between 30–70%. Matthews interpreted the mud to have two general sources: production on shoals followed by transport, and in situ production. He concluded, “If this investigation has served no other purpose, it has demonstrated that lime mud may have multiple origins.”