Geology of the Upper Eastern Maniototo.
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The area under study covers 35 sq km and is located on the eastern margin of the upper Maniototo basin, lying approximately between Patearoa and Hamiltons diggings.
Two contrasting geological provinces are juxtaposed across a broadly linear fault, produced during the late mid-Miocene phase of compressional tectonics. To the east of the fault lies the Haast Schist terrain, consisting of textural zone 3b pumpellyite-actinolite facies and textural zone 2b semischists. To the west of the trace, a tertiary sequence of fluvial/ lacustrinal Manuherikia Group sediments rests uncomfortably on schist basement, having been protected from erosion by block faulting. Piedmont gravels of the Maori Bottom gravels overlie these sediments, in some places with strong angular unconformity and in others apparently conformably. A new subdivision of the Maori Bottom gravels based on this and other criteria is attempted. Deposition of river terraces completed the sedimentary history.
Three small outliers of the Waipiata Volcanic Complex are described. A detailed analysis of the sedimentological history of alluvial gold throughout the region is given.
Two contrasting geological provinces are juxtaposed across a broadly linear fault, produced during the late mid-Miocene phase of compressional tectonics. To the east of the fault lies the Haast Schist terrain, consisting of textural zone 3b pumpellyite-actinolite facies and textural zone 2b semischists. To the west of the trace, a tertiary sequence of fluvial/ lacustrinal Manuherikia Group sediments rests uncomfortably on schist basement, having been protected from erosion by block faulting. Piedmont gravels of the Maori Bottom gravels overlie these sediments, in some places with strong angular unconformity and in others apparently conformably. A new subdivision of the Maori Bottom gravels based on this and other criteria is attempted. Deposition of river terraces completed the sedimentary history.
Three small outliers of the Waipiata Volcanic Complex are described. A detailed analysis of the sedimentological history of alluvial gold throughout the region is given.
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118 leaves : ill. (some col.) ; 30 cm.
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1980Brooks
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POLYGON ((170.02817540447964 -45.268291576849421,170.094815151985898 -45.218205922332999,170.178048123456904 -45.21314942431183,170.17755797004574 -45.24856491534991,170.129091369682442 -45.248546776547997,170.064604903273136 -45.289478721597312,170.02817540447964 -45.268291576849421))
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Brooks, Peter Kenneth., “Geology of the Upper Eastern Maniototo.,” Otago Geology Theses, accessed June 12, 2025, https://theses.otagogeology.org.nz/items/show/131.