. Description of the test specimen of the rostro-carinate industry found beneath the Norwich Crag . dental crushing of this stone by others during slidingmovement of the strata in which it was embedded, or through the accumulation ofa vast weight of ice or of sandy deposit above it, accompanied or not accompaniedby lateral movement. It seems to me that the only way in which we can hope to make any progresstowards a common agreement in regard to the question of the human or non-human flaking of certain flints to which I have given the name rostro-carinate is by selecting the specimens which are
. Description of the test specimen of the rostro-carinate industry found beneath the Norwich Crag . dental crushing of this stone by others during slidingmovement of the strata in which it was embedded, or through the accumulation ofa vast weight of ice or of sandy deposit above it, accompanied or not accompaniedby lateral movement. It seems to me that the only way in which we can hope to make any progresstowards a common agreement in regard to the question of the human or non-human flaking of certain flints to which I have given the name rostro-carinate is by selecting the specimens which are most decisively in favour of the conclusionthat their form is due to human workmanship. When once it is agreed tliat even Of Geological Survey of the United Kingdom. Rostro-Carinate Industry found beneath the Norwich Crag. 3 one specimen is of human workmanship, we should proceed to the consideration ofothers of somewhat less convincing character and eventually deal with those which,though bearing indications of human fracturing sufficient in the opinion of certain Ant. jtSKa^^ ^^^^^^ -^^. FIG. 1. FIG. 2. Text Fig. 1.—Dorsal view of a rostro-carinate flint implement from the stone-bed below theNorwich Crag ; obtained with many others at Whitlingham, near Norwich, byMr. W. G. Clarke. L, left; E, right side. The grain-tint indicates original unworkedsurface of the flint. Drawn of the actual size. Text Fig. 2.—Ventral view of the specimen drawn in fig. 1. The special flat fractured surfacebehind the beak (which is very frequently seen in rostro-carinates ) is shown, andmarked X. The rest of the ventral plane is remarkable as being formed in greatpart by one fracture. It is very flat and smooth, but is scored by numerous glacialscratches, which are marked gl. observers to turn the balance in favour of that origin, are yet not inconceivablynor with very great improbability ascribed by other observers to accidental non-human agencies of fracture. A 2 4 Sir Eay Lankester.—
Size: 1746px × 1431px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlankestererayedwinray, bookcentury1900, bookdecade1910
