. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. 02 cqWP3 O fin o f-H %u m o H CO O IX MOUNT EREBUS 215 The walls of the crater itself were of special interest. They were formed, asfar as superficial appearance went, of belts of dark pumiceous lava and bands ofwhite snow. The latter were not necessarily interbedded, though it is quite possiblethat some of them were so, as for a considerable distance before reaching the edgeof the crater we had observed, as already stated, that the floor of the older craterhad
. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. 02 cqWP3 O fin o f-H %u m o H CO O IX MOUNT EREBUS 215 The walls of the crater itself were of special interest. They were formed, asfar as superficial appearance went, of belts of dark pumiceous lava and bands ofwhite snow. The latter were not necessarily interbedded, though it is quite possiblethat some of them were so, as for a considerable distance before reaching the edgeof the crater we had observed, as already stated, that the floor of the older craterhad been levelled up by alternate beds of snow and pumice with felspar two last had obviously been produced from the present active crater, and hadbeen deposited in their present position by the action of strong winds coming froma southerly direction. A specially thick bed of dark-brown pumiceous lava occurredat perhaps about 300 feet below the lip of the crater, and when the main steamcloud was blown aside we noticed many scores of small steam jets rising from theline of contact of its upper surface with the snow. It is unlikely that thes
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