Round Hill, Waitaki District, Otago Region, South Island, New Zealand
Latitude & Longitude (WGS84): | 45° 1' 31'' South , 170° 51' 39'' East |
---|---|
Latitude & Longitude (decimal): | -45.02548,170.86110 |
Köppen climate type: | Cfb : Temperate oceanic climate |
The site is off the Ngpara Weston road and opposite the church, the area is locally referred to as Round Hill.
This hill was once a submerged volcano and was probably connected with the Oamaru volcanics. What is unusual with these volcanics is the presence of this yellow material interdispersed through the volcanics (basalt). It ranges in colour from yellow (like hokey pokey) to brown to dark red or a pattern of these colours.The rock has several different forms – nodular, layered, nodular on surface only to very solid (agate like) -this material was the hardness and can be polished, cut and carved.
To the east of the hill the exposed basalt when broken showed cavities that had filled with calcite – giving the ‘eye agate look’ that can be found at the Maerewhenua River.
Mineral List
3 valid minerals.
Regional Geology
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
Quaternary 0 - 2.588 Ma ID: 3192366 | Cenozoic sedimentary rocks Age: Pleistocene (0 - 2.588 Ma) Lithology: Gravel,glacial deposits,conglomerate Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154] |
Early Oligocene 28.1 - 33.9 Ma ID: 1311574 | Deborah Volcanics Age: Oligocene (28.1 - 33.9 Ma) Stratigraphic Name: Deborah Volcanics Description: Basaltic scoria, tuff, lapilli and breccia; basaltic and doleritic dikes, plugs and intrusive masses. Comments: Zealandia Megasequence Extrusive and Intrusive Rocks (Paleogene to Cretaceous) Lithology: Basalt, tuffite, lapilli tuff, breccia, dolerite Reference: Edbrooke, S.W., Heron, D.W., Forsyth, P.J., Jongens, R. (compilers). Geology Map of New Zealand 1:1 000 000. GNS Science Geological Map 2. [12] |
Rupelian 28.1 - 33.9 Ma ID: 1361275 | Deborah Volcanics basalt (Alma Group) Age: Oligocene (28.1 - 33.9 Ma) Stratigraphic Name: Deborah Volcanics Description: Basanitic and basaltic flows, dikes, plugs and intrusive masses of Deborah Volcanics. Comments: Paleogene igneous rocks. Age based on K-Ar dating Lithology: Major:: {basalt},Minor:: {basanite} Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. [13] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
External Links
http://rsnz.natlib.govt.nz/volume/rsnz_19/rsnz_19_00_006290.html
Round Hill, Waitaki District, Otago Region, South Island, New Zealand