. Shore processes and shoreline development . Bolus Head Fig. 48. — Crenulate shoreline of the southwest coast of Ireland. 276 YOUNG STAGE 277. 278 DEVELOPMENT OF THE SHORELINE because resistant and non-resistant rocks are unequally affectedby wave erosion. In a similar manner the initial shoreline israpidly made extremely irregular, on a small scale, whereverthe land presents to the sea rocks of unequal resistance. Thehills and valleys of the land may have been well graded andcharacterized by smooth, flowing contours, in which case theinitial shoreline must be composed of well-roun
. Shore processes and shoreline development . Bolus Head Fig. 48. — Crenulate shoreline of the southwest coast of Ireland. 276 YOUNG STAGE 277. 278 DEVELOPMENT OF THE SHORELINE because resistant and non-resistant rocks are unequally affectedby wave erosion. In a similar manner the initial shoreline israpidly made extremely irregular, on a small scale, whereverthe land presents to the sea rocks of unequal resistance. Thehills and valleys of the land may have been well graded andcharacterized by smooth, flowing contours, in which case theinitial shoreline must be composed of well-rounded curves. But early in the youthof the shoreline thecurves will be changedto sharply and irregu-larly crenulate linesby differential waveerosion-^ (Fig. 47). Inother words, althoughthe ultimate goal ofwave erosion is tomake a shoreline ofsubmergence lessirregular, as will pres-ently appear, the firsteffect is to make itminutely more irreg-ular. We may call ashoreline of this char-acter a crenulate shore-line. The shorelineof southwestern Ire-land (Fig. 48), border-ing the beautifullygraded hills of a ma-turely dissected andpartially su
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