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105:, several kilometres to the east. Some of these are readily viewed by the public, such as the series of columns at the western end, which are accessible from Waldronville and Blackhead Beaches. Many of the more spectacular formations, such as the "Roman Baths" and "The Docks" are much harder and more hazardous to access, as they lie on the seaward side of the outcrop. Another feature which is equally difficult to access is Caversham Cavern, one of the largest sea caves on the Otago coast.
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164:. During the 1980s, Fulton Hogan proposed to quarry the centre of the headland down to 50 m below sea level and form a boat harbour in the northeast. This was effectively blocked by a conservation group, The Friends of Blackhead, which was formed specifically to oppose the proposals.
59:, some 10 kilometres (6.2 mi) southwest of the city centre. The promontory extends some 500 metres into the ocean, and rises to a height of a little over 100 metres (330 ft).
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Blackhead is the site of an active quarry, Blackhead Quarry, which has been operating since the 1950s, and is currently a joint venture between Palmer & Sons and
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Graham, I. T.; Pogson, R. E.; Colchester, D. M.; Baines, A. (2018). "Zeolite crystal habits, compositions, and paragenesis; Blackhead Quarry, Dunedin, New
Zealand".
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The area of coast to the east of
Blackhead is rugged and steep, with many cliff prominences. The tourist attraction of
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lies in this area, 3 km from
Blackhead. To the west, the coast is more low-lying with beaches. The community of
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160:. This is mainly used for roading chip. The basalt columns are not quarried; they are protected under a
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about 10 mya, the eroded and long-extinct remains of which form the ridge of hills surrounding
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is produced annually, consisting mainly of basalt and with small quantities of
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is located here, some 1500 metres from
Blackhead, close to the mouth of the
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Geologically, Blackhead formed around a peripheral vent of the
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Columnar basalt at
Blackhead is protected by legal covenant.
325:," Blackhead Quarries Limited. Retrieved 7 March 2019.
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174:List of rock formations of New Zealand
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55:. It lies within the city limits of
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199:GC39JRR Blackhead Basalt Columns
47:is a promontory on the coast of
394:Columnar basalts of New Zealand
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282:Blackhead Quarry, Dunedin City
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101:, similar to those located at
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389:Volcanic plugs of New Zealand
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16:Point in Dunedin, New Zealand
132:. Around 120,000 tonnes of
67:(the waters of Tinarau) and
63:names for Blackhead include
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124:found at Blackhead Quarry.
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384:Rock formations of Otago
249:10.1180/0026461036740122
305:Retrieved 7 March 2019.
350:45.93194°S 170.43194°E
237:Mineralogical Magazine
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379:Geography of Dunedin
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341:170°25′55″E
142:phillipsite
53:New Zealand
368:Categories
338:45°55′55″S
286:mindat.org
180:References
158:thomsonite
120:a kind of
118:Gonnardite
265:129375572
257:0026-461X
154:chabazite
138:natrolite
69:Makereatu
45:Blackhead
32:Blackhead
319:Archived
168:See also
162:covenant
150:olivine
146:calcite
122:zeolite
57:Dunedin
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156:, and
109:Quarry
261:S2CID
61:Māori
49:Otago
253:ISSN
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
