. The Quarterly journal of the Geological Society of London. eother smooth surfaces, has been rubbed by the ice. On the samesurface there is ripple-mark, the natural edge or termination of whichis seen, and by it the tracks are obliterated. Three of them come upto the edge of the ripple, and are not traceable upon it. From thegeneral line of the edge a part projects, like a spur or triangle, whichis marked across by the ripple up to the apex, as if the cause pro-ducing the ripple had reached that far and no farther. The partlettered d also shows ripple-marks, and is 6 inches higher than thesur
. The Quarterly journal of the Geological Society of London. eother smooth surfaces, has been rubbed by the ice. On the samesurface there is ripple-mark, the natural edge or termination of whichis seen, and by it the tracks are obliterated. Three of them come upto the edge of the ripple, and are not traceable upon it. From thegeneral line of the edge a part projects, like a spur or triangle, whichis marked across by the ripple up to the apex, as if the cause pro-ducing the ripple had reached that far and no farther. The partlettered d also shows ripple-marks, and is 6 inches higher than thesurface marked c, which runs on below it, and while the direction ofthe ripple-lines on c? is S. 53° E, those on c run S. 80° E. On the * Rather less of this track appears in the plan than on the In the plan this track extends further than on the A portion of this track, to the extent of 87 feet, on the sandstone slab, istemporarily placed in the Societys Museum by Mr. Logan. \.. Qiu(^rfy-JcziT?^ G& . _^ol. t. ?-/4-. (ii</A7i, . ^:.
Size: 1208px × 2069px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
