Despite being designed during an early and somewhat primitive stage of the science of geology, it is remarkable how accurate these sections were, describing a sequence of 36 stratigraphical levels in Derbyshire rocks with a lengthy fold-out cross-section of almost the entire width of Derbyshire.
Meski diracang pada tahap awal dan agak primitif dalam ilmu geologi, namun karya ini luar biasa menggambarkan cukup akurat bagian-bagian 36 tingkatan stratigrafi bebatuan di Derbyshire dengan skala penampang yang menggambarkan seluruh daerah Derbyshire.