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I really didn’t get to explore and photograph the basalt as much as I would have liked because the skua kept attacking me with a vengeance. I covered my head with my fleece jacket and cursed myself for leaving my umbrella in the car. They sliced across my head more times than I can count but as far as I can tell, they didn’t actually cut me open. It hurt, though, and it was unnerving, so I finally yelled, “Okay, okay! I’m leaving! Jesus Christ!” and stomped back to the car.
Cook's Head Rock is a phonolite basalt rock standing on the Chrystall's Beach expanse closely north of the rivermouth settlement Toko Mouth of South Otago, New Zealand.
The lower faces of the rock are made up of numerous hexagonal basalt columns suggesting Cook's Head Rock is a former volcanic vent.
Slightly posterising an image brings out the grain of the rock and enhances the teaching qualities of the geo image?
Svartifoss
Svartifoss (Black Fall) is a waterfall in Skaftafell in Vatnajökull National Park in Iceland, and is one of the most popular sights in the park. It is surrounded by dark lava columns, which gave rise to its name. Other well-known columnar jointing formations are seen at the Giant's Causeway in Northern Ireland, Devil's Tower in Wyoming, USA and on the island of Staffa in Scotland. There are also similar formations throughout Iceland, including a small cave on the beach of Reynisdrangar.
The base of this waterfall is noteworthy for its sharp rocks. New hexagonal column sections break off faster than the falling water wears down the edges.
These basalt columns have provided inspiration for Icelandic architects, most visibly in the Hallgrímskirkja church in Reykjavík, and also the National Theatre.
Rocky features at Bombo Headland near Kiama.
The Bombo Headland's clusters of hexagonal basalt columns are an internationally recognised geological phenomena.
On either bank of the Jökulsá á Fjöllum river leading to Selfoss waterfall are these basalt columns. The Jökulsá á Fjöllum river flows through Jökulsárgljúfur Canyon from the Vatnajökull glacier to Öxarfjörður Bay.
On either side of Aldeyjarfoss waterfall (a 20 m high waterfall in Bárðardalur District of northern Iceland at the northern part of the Sprengisandur highland road), are rows of symmetrical hexagonal basalt columns. Basalt columns are formed by a process called columnar jointing when still magma cools down. When it cools down, it contracts and separates into columnar joints, often hexagonal. The separation begins where the cooling is greatest and continues as the rest cools little by little.
On either side of Aldeyjarfoss waterfall (a 20 m high waterfall in Bárðardalur District of northern Iceland at the northern part of the Sprengisandur highland road), are rows of symmetrical hexagonal basalt columns. Basalt columns are formed by a process called columnar jointing when still magma cools down. When it cools down, it contracts and separates into columnar joints, often hexagonal. The separation begins where the cooling is greatest and continues as the rest cools little by little.
Cook's Head Rock is a phonolite basalt rock standing on the Chrystall's Beach expanse closely north of the rivermouth settlement Toko Mouth of South Otago, New Zealand.
The lower faces of the rock are made up of numerous hexagonal basalt columns suggesting Cook's Head Rock is a former volcanic vent.