. The Quarterly journal of the Geological Society of London. ilippson concludes that the Xorth IEgean basins were notoccupied by the Mediterranean until Quaternary times; that thelowering of the collapsed regions is still going on ; and that, inaddition, a general subsidence of the iEgean land has taken placesince the beginning of the Quaternary Period (14, pp. 135, 139,141). It is not possible, therefore, to ascertain what the water-levelin this district was when equilibrium took place between the Ponto-Caspian and the Mediterranean, as all traces of this event havebeen since submerged. So fa
. The Quarterly journal of the Geological Society of London. ilippson concludes that the Xorth IEgean basins were notoccupied by the Mediterranean until Quaternary times; that thelowering of the collapsed regions is still going on ; and that, inaddition, a general subsidence of the iEgean land has taken placesince the beginning of the Quaternary Period (14, pp. 135, 139,141). It is not possible, therefore, to ascertain what the water-levelin this district was when equilibrium took place between the Ponto-Caspian and the Mediterranean, as all traces of this event havebeen since submerged. So far as the Sea of Marmora is concerned,the profile of the south-western entrance of the Bosphorus showsthat its level did not differ materially from the present one. There have been, as will now be shown, various considerableoscillations of water-level since the opening of the Straits; but, sofar as I am aware, there is no evidence to show that they have notbeen quietly effected, in every case, by a gradual rise or fall ofthe water. r 2 3* o « g^ 53 g S3 *1. Vol. 6o.[ EOCENE, ETC. SURROUNDING THE DARDANELLES. 269 After the completion of the discharge of the Ponto-Caspian water,and the formation of a sea-connection through the Dardanelles, thewater in the Sea of Marmora became again sufficiently salt to allowof the entry of the existing Mediterranean fauna in early Pleistocenetimes. Traces of this invasion occur at many points in the Sea ofMarmora. Vestiges of a beach-conglomerate, about 330 feet abovethe present sea-level, occur, as stated in my previous paper, nearMyriophyto, on the northern shore (9, p. 159). Quite recently, Mr. Claude Warner has traced for me the remainsof a Mediterranean shell-beach in situ at Hora, 405 feet abovethe sea (fig. 9, p. 2(53), and about 1000 yards farther inland than thelacustrine beach at the 130-foot level, which I had previously seenat that place. There are numerous scattered blocks of conglomerateat Hora, both above and below the 130-foot le
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