Geologie, or Erþe Science is þe lore of rokes. A skoler of geology ys nemned geologiſt.
Þe geologyſt sekeþ andȝet of þe formacioun of ſtoon, his aage, hys kinde and eek of his tranſmutacioun of oon genre to an oþer. Swilche scoleres perceven þe same þurȝ overſiȝth of þe arraiyng of þe rokke cours in cludes and in þe grounde. Þerto overſen þai smale ſticches of a rok for to lernen of þe criſtales þerin, for þe compoſicioun of minerales yn a rok diffineþ his kynde.