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Reviewer: Mike Christie ( talk · contribs) 17:33, 17 February 2018 (UTC)
I'll review this. Mike Christie ( talk - contribs - library) 17:33, 17 February 2018 (UTC)
I'll copyedit as I read through; please revert as necessary if I screw anything up.
To the west, the shield drops down to a bajada close to the margin of the Salar de Atacama, a bajada being a structure formed by debris flows and gravel fans: suggest "To the west, close to the margin of the Salar de Atacama, the shield drops down to a bajada (a structure formed by debris flows and gravel fans)".
Clockwise starting from the west this semicircle includes: "includes" needs a subject; perhaps "Clockwise starting from the west this semicircle the complex includes"?
the 5,262, 5,462 metres (17,264, 17,920 ft) Cerro Aspero-Cerro Putas (23°5′0″S 67°42′0″W and 23°6′0″S 67°43′0″W) to the south: this is ugly and very hard to read.
A north-south trending system of fractures and conspicuous normal faults cuts across the western margin of the Purico complex in north-south direction: repeats "north-south".
Characteristic for the Purico ignimbrite are the so-called "banded" pumice: should be "is the", unless pumice is implicitly plural here.
Such hydrothermal alteration processes are also the origin of the sulfur deposits at Purico and other volcanoes in the world: why mention other volcanoes here, and almost nowhere else? This is surely an obvious observation -- almost any process described in this article applies to volcanoes elsewhere.
Aspero was considered to be of Holocene age; later dates of 180,000 ± 20,000 years ago were obtained on Aspero and Chascon: assuming I'm interpreting this correctly, I suggest "Aspero was once considered to be of Holocene age; later, dates of 180,000 ± 20,000 years ago were obtained on Aspero and Chascon". The comma after "later" avoids the reading of "later dates".
-- Mike Christie ( talk - contribs - library) 21:20, 17 February 2018 (UTC)
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Reviewer: Mike Christie ( talk · contribs) 17:33, 17 February 2018 (UTC)
I'll review this. Mike Christie ( talk - contribs - library) 17:33, 17 February 2018 (UTC)
I'll copyedit as I read through; please revert as necessary if I screw anything up.
To the west, the shield drops down to a bajada close to the margin of the Salar de Atacama, a bajada being a structure formed by debris flows and gravel fans: suggest "To the west, close to the margin of the Salar de Atacama, the shield drops down to a bajada (a structure formed by debris flows and gravel fans)".
Clockwise starting from the west this semicircle includes: "includes" needs a subject; perhaps "Clockwise starting from the west this semicircle the complex includes"?
the 5,262, 5,462 metres (17,264, 17,920 ft) Cerro Aspero-Cerro Putas (23°5′0″S 67°42′0″W and 23°6′0″S 67°43′0″W) to the south: this is ugly and very hard to read.
A north-south trending system of fractures and conspicuous normal faults cuts across the western margin of the Purico complex in north-south direction: repeats "north-south".
Characteristic for the Purico ignimbrite are the so-called "banded" pumice: should be "is the", unless pumice is implicitly plural here.
Such hydrothermal alteration processes are also the origin of the sulfur deposits at Purico and other volcanoes in the world: why mention other volcanoes here, and almost nowhere else? This is surely an obvious observation -- almost any process described in this article applies to volcanoes elsewhere.
Aspero was considered to be of Holocene age; later dates of 180,000 ± 20,000 years ago were obtained on Aspero and Chascon: assuming I'm interpreting this correctly, I suggest "Aspero was once considered to be of Holocene age; later, dates of 180,000 ± 20,000 years ago were obtained on Aspero and Chascon". The comma after "later" avoids the reading of "later dates".
-- Mike Christie ( talk - contribs - library) 21:20, 17 February 2018 (UTC)