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  • Mount Langla is one of a group of volcanoes which lies on the western end of the island of New Britain. The 3,800 feet cone is on the eastern flank of the ancient volcano, Mount Talawe and is almost due south of the wartime Gloucester airstrip. The original report concerning the signs of increasing activity was made by Father McSweeney of the Kalingi Catholic Mission. Father McSweeney was returning from a trip along the north coast on 12th May, when he noticed condensed steam rising from a new location on the summit of Mount Langla. On a visit to Borgen Bay on 30th May he saw gas bubbles in the sea close to the shoreline adjacent to the small conical hill which lies on the western side of the Bay. At the request of the Government Secretary the writer left Popondetta and flew to Lae on 18th June, and left by trawler the same day to arrive at Kalingi on 20th June. An inspection of the volcano confirmed the recent nature of the increase in gas emission and revealed a number of phenomena which are usually identified as pre-eruption conditions.

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  • A recent survey by Geoscience Australia acquired new exploration data and samples in the frontier offshore Lord Hose Rise (LHR) Capel-Faust region. This survey identified a number of volcanic features including cones, flows and sill-related features on the seafloor. Based on analysis of seismic data in the region (s302) and swath bathymetry, there are at least two distinct ages of volcanism exposed on the seafloor; Miocene-Pliocene (approximately 4-7 Ma) cones with a largely unmodified conical shape and Eocene-Oligocene volcanic features. The Eocene-Oligocene edifices can be seen on seismic profiles to extend from Palaeocene-Eocene and Eocene-Oligocene unconformities, in many cases overlying basement highs, through a blanket of marine ooze, to be exposed on the seafloor. Each cone is surrounded by a moat where the currents have eroded sediment. The Gifford Guyot (approximately 18 Ma), part of the Lord Howe Seamount chain was included in the survey area. Volcanic features are common on the seafloor of the Lord Howe Rise and in the neighbouring Tasman Basin, with two identified north-south seamount hotspot chains to the west of the Capel-Faust region that have been active from the Miocene to recent. The ZoNéCo 5 survey also identified a few small conical seamounts on the northern LHR, along a roughly north-northwest trend, dated as Early Miocene. The younger Capel-Faust seamounts are aligned with these and the age relationships suggest they could be part of a single seamount chain. The older Eocene-Oligocene cones do not show any preferred alignment within the survey area and are too old to be related to the current hotspot activity identified in the region. Presented to the Australian Earth Sciences Convention (AESC) 4 - 8th July 2010

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