Montaña Amarilla
| Montaña Amarilla | ||
|---|---|---|
 Montaña Amarilla |
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| height | 172 msnm | |
| location | La Graciosa , Canary Islands , Spain | |
| Dominance | 4.3 km → Montaña Las Agujas | |
| Coordinates | 29 ° 13 '22 " N , 13 ° 32' 18" W | |
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| Type | Cinder cone | |
| rock | Tuff , basalt | |
| Last eruption | more than 11,000 years ago | |
The Montaña Amarilla ( German: Yellow Mountain ) is a volcano on to Spain belonging Canary Island of La Graciosa .
description
The Montaña Amarilla is located on the southwest tip of La Graciosas, near Cape Punta del Pobre and about 3.5 kilometers from the island's capital, Caleta del Sebo . Its highest point is 172 meters above sea level. The oval volcanic cone, which opens to the north, has a diameter of 650 to 900 meters at the base. Its southern flank, which slopes down into a small bay, is cut by coastal erosion and reveals its internal structure. Its ocher yellow color gave the mountain its name. At the bay, next to the volcano, there is the 50 meter wide sandy beach of Playa de la Cocina .
Emergence
The formation of the central volcanic chain La Graciosas, consisting of Montaña Amarilla, Montaña del Mojón, Montaña Las Agujas and Montaña Lomo del Burro, began at a fissure running in a southwest-northeast direction 39,000 years ago and was completed 11,130 years ago. The Montaña Amarilla was created in two phases. Its inner part consists of hydromagmatic pyroclastic deposits, which indicate the formation of the volcano in a shallow underwater environment. These deposits are colored ocher yellow due to a palagonitic transformation (through water absorption and oxidation of the iron). They are traversed by two basaltic dykes , which represent the supply channels of the second phase of development. In this - this time without the influence of water - a typical tephra cone was formed from lapilli and slag, which is rust-red in color due to oxidation .
View from Lanzarote to the southern part of La Graciosas with the Montaña Amarilla
South flank of the Montaña Amarilla with the sandy beach Playa de la Cocina
View from Montaña Amarilla over La Graciosa and the islands of Montaña Clara , Roque del Oeste and Alegranza
Web links
Individual evidence
- ↑ a b A. Hansen, F. Pérez Torrado: The Island and its Territory: Volcanism in Lanzarote (PDF; 940 kB). Sixth International Conference on Geomorphology, Field trip guide C1 (English).
- ↑ a b c L. A. Cueto Pascual, R. Balcells Herrera, JL Barrera Morate, JA Sainz de Aja, MT García: Mapa geológico de España . Scale 1: 25,000, sheet 1079-II: Graciosa . Instituto Geológico y Minero de España, Madrid 1990, ISBN 84-7840-520-8 . Booklet (PDF; 890 kB), accessed on January 21, 2020 (Spanish).
- ↑ Palagonitisierung , Lexicon of Geosciences on Spektrum.de, accessed on January 22, 2020.