io8 SHINGLE BEACHES AND THEIR FIXATION
sumed this will follow the original lines. Parts of the Blakeney Bank illustrate this (see fig. 28). From 1907 to 1912 to our
Fig. 37.—Contoured Chart of a Strip, 50 feet wide, of Blakeney Main Beach from the Crest (above) to the Marsh (in front)
      The three Stueda fruticosa zones (black) cross the chart horizontally. The contours (broken lines) are drawn for every half-foot, the heights above the average level of the marsh being given in the left-hand column (roman figures). The horizontal distances from the marsh are given in the right-hand column. To the right of the main diagram a profile of the bank section a-b is given (vertical factor X5). Lower dbwn on the right the section c-D is plotted showing the two gullies cut across.
certain knowledge, and for ten years prior to 1907 in all probability, no shingle travelled by the gully shown. When at length, in 1912, after a probable interval of fifteen years, the