Mineral resource trace features are represented with line features and have attributes describing the commodity available, host geological feature, type of working and lithology, if known. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.

Annotation in this layer contains age information for point features in NZL_GNS_GM5_geochronology_50k. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.

This georeferenced raster image represents aeromagnetic data for the Middlemarch area depicting total magnetic intensity. The data is part of a geophysical survey undertaken for Glass Earth NZ Ltd. in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

This georeferenced raster image represents electromagnetic data for the Middlemarch area depicting apparent resistivity at 140 000 Hz. The data is part of a geophysical survey undertaken for Glass Earth NZ Ltd. in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

Annotation in this layer contains the mapSymbol for polygon features depicted in NZL_GNS_GM5_geological_units_50k. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.

This georeferenced raster image represents aeromagnetic data for the Middlemarch area depicting total magnetic intensity, reduced to pole, horizontal gradient. The data is part of a geophysical survey undertaken for Glass Earth NZ Ltd. in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

This georeferenced raster image represents electromagnetic data for the Middlemarch area depicting apparent resistivity at 3300 Hz CoAxial. The data is part of a geophysical survey undertaken for Glass Earth NZ Ltd. in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

This georeferenced raster image represents electromagnetic data for the Middlemarch area depicting apparent resistivity at 1800 Hz. The data is part of a geophysical survey undertaken for Glass Earth NZ Ltd. in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

Areas of similar magnetic character are identified by polygon features and described in terms of relative frequency and amplitude. This data layer contains interpretation of the total magnetic intensity reduced to pole aeromagnetic data from the Glass Earth geophysical survey undertaken in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

The extent and nature of geological boundaries are represented by line features and described in terms of the type of boundary and the accuracy with which the boundary is located. It complies with the GeoSciML Portrayal standard for ContactView and fields required by that standard were populated using the CGI Controlled Vocabulary (2012-11). The data layer is part of the 'Geology of the Victoria Range' 1:50 000 dataset covering a part of of the Buller District on the West Coast of the South Island of New Zealand.