Transactions of the Royal Society of Edinburgh . e manner in which they catch up and completely enclose portionsof the underlying or overlying strata. The well-known examples onSalisbury Crags (fig. 18) are paralleled by scores of other instances in different parts of the region. The subjoined woodcut () represents the way in which an intrusive sheetof a pale much altered rock involves shales in theEdinburgh district. Moreover, the sheets do not always remain on thesame horizon; that is, between the same strata. Theymay be observed to steal across or break through thebeds so as to lie su
Transactions of the Royal Society of Edinburgh . e manner in which they catch up and completely enclose portionsof the underlying or overlying strata. The well-known examples onSalisbury Crags (fig. 18) are paralleled by scores of other instances in different parts of the region. The subjoined woodcut () represents the way in which an intrusive sheetof a pale much altered rock involves shales in theEdinburgh district. Moreover, the sheets do not always remain on thesame horizon; that is, between the same strata. Theymay be observed to steal across or break through thebeds so as to lie successively between different more instructive example of this relation could becited than that of the intrusive rock which has beenlaid open in the Dodhead Limestone Quarry, nearBurntisland. As shown in the accompanying figure(fig. 20) this rock breaks through the limestone andthen spreads out among the overlying shales, across which it passes when we trace the larger intrusive sheets this transgressive character is seen. Fig. 18.—Intrusive dolerite sheetenclosing and sending threads intoportions of shale, Salisbury Crags,Edinburgh. ^\\WSji^
Size: 1453px × 1719px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorroyalsocietyofedinbur, bookcentury1800, bookdecade1880
