File:The Quarterly journal of the Geological Society of London (1862) (14764152502).jpg

Identifier: quarterlyjourna181862geol (find matches)
Title: The Quarterly journal of the Geological Society of London
Year: 1845 (1840s)
Authors: Geological Society of London
Subjects: Geology
Publisher: London (etc.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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ld-fields known as Allens and Laidlawsappeared best to meet the above conditions. They are interestingbeyond a doubt, and are contiguous to excellent sections of rocks ontwo lines of railway, and are therefore somewhat favourably situatedfor the purpose of observation. (See Map.) In describing these gold-fields, we shall begin with the positionthat is lowest, geologically and otherwise; this is Allens field. Therock in situ is dark-coloured clay-slate; it is often talcose. Thiscontains abundance of crystals of mispickle. It is pervaded by anumber of vertical veins of auriferous quartz. These are exposedon the sides and bottoms of pits and trenches. It is only fromreport that I can say that they are auriferous; I could not get anyinformation on the spot. The top of the slate-rock was glacier-scratched ; and in some cases from 7 to 10 feet of drift had beenpenetrated before the strata had been reached. Crossing the canaland main road, and climbing a hill, we come, in a few hundred yards
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344 PROCEEDINGS OE THE GEOLOGICAL SOCIETY. (May 21, to the south-east, to Laidlaws field. Here some were clearingaway the superficial drift, and uncovering the quartzite (whinstoneof the miners) ; others were blasting the quartzite that covered thequartz-vein (or the quartz-barrels of the miners); others werebreaking up the quartz-barrels, removing the quartz, and storingit up for the crushing-machine. The rock exposed on the removal ofthe quartz is a chloritic slate. On this the quartz lies, nearly horizon-tal, slightly inclined to the west, somewhat like a stratum. This iscomposed of the said barrels, which appear from above to be lyingalongside of each other and unconnected; but the captain of theVictoria Claim assured me that they were connected at the un-derside. The shape of the ridges of quartz is irregular, beingsometimes angular, sometimes more or less rounded. At the timeof my visit the appearance in the Victoria Claim was very strik-ing ; all the uncovered barrels had been

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