Surface cracking due to hanging wall failure, underground in Black Star

DESCRIPTION

DescriptionOn the 10th of May 1934 a N-S crack was observed out in the Black Star Lode's hangingwall some 175ft. Directly west from rim of No. 6 Glory Hole. Its length when first discovered was 100ft. By the 15th of June its length had increased to 155ft. This is referred to as No 1 Crack. On the latter day a 185ft N-S crack developed 10ft east of the first, overlapping its north half and extending northward another 120ft, giving a total inclusive length for both cracks of 275ft. This is referred to No. 2 Crack. At no place did the width of either crack exceed 1/2in.RightsPublic DomainCollectionReginald O'BrienSubjectMiningNatural WorldMining Sites

LOCATION

PlaceMount Isa MinesGeolocation^[1]

IDENTIFIERS

KeywordBlack StarFailureGlory HoleHanging WallMount Isa Mines LimitedTaxonomyLocation | Mount Isa MinesTopics | Mining

CONNECTIONS

OrganisationMount Isa Mines

ADMIN

Trove TypeStill Image

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Surface cracking due to hanging wall failure, underground in Black Star

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Surface cracking due to hanging wall failure, underground in Black Star