. Geological magazine. ning tide. We still find here leavesof trees, many of them doubtless overhanging the lagoons, whichhave so slowly decayed, that they are overgrown with Polyzoa;crowds of oysters are met with; we find the remains of shore-crabs,which overran the muddy shore ; Callianassce, which burrowed inthe mud; Calyptrma, Area, Corbula, and many other shell-bearingmolluscs. This lagoon condition went on until the gradual sink-ing permitted the ever-encroaching surf to break over the lagoonbarrier, to rush in and overwhelm them with rolled shingle and sea-sand. We still trace the lagoo
. Geological magazine. ning tide. We still find here leavesof trees, many of them doubtless overhanging the lagoons, whichhave so slowly decayed, that they are overgrown with Polyzoa;crowds of oysters are met with; we find the remains of shore-crabs,which overran the muddy shore ; Callianassce, which burrowed inthe mud; Calyptrma, Area, Corbula, and many other shell-bearingmolluscs. This lagoon condition went on until the gradual sink-ing permitted the ever-encroaching surf to break over the lagoonbarrier, to rush in and overwhelm them with rolled shingle and sea-sand. We still trace the lagoon condition for a mile or so east,where it is represented by cigar-ash-coloured sands, impregnated 134 Reports and Proceedings—Geologists^ Association. with salt, and coloured with the dark tint of carbonaceous sands contain very perfect remains of branches of a Coniferoustree resembling the genus Dacridium and large pieces of Cactus. Itshould be mentioned that this is the earliest cactus known, and that. Fig. 4.—branch OF CONIFER {Taxodium). the spines are found to be still flexible. The sands are in otherplaces crowded with fruits—probably a Pandanus fruit (Nipadites)—resembling those met with at Sheppey. Unfortunately the salt con-tained in them effloresces and splits all these specimens into frag-ments.
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Keywords: ., bookauthorwoodward, bookcentury1800, bookdecade1870, bookyear1877
