Fichièr:Basalt 3 (48674276863).jpg
Fichièr d'origina (2 077 × 2 100 pixèl, talha del fichièr: 3,43 Mo, tipe MIME: image/jpeg)
|
Aqueste fichièr proven de Wikimedia Commons?. Las informacions que lo concernisson son afichadas çaijós (procedura). |
.jpg?uselang=oc){kind=link}
Descripcion
| Descripcion |
Igneous rocks form by the cooling & crystallization of hot, molten rock (magma & lava). If this happens at or near the land surface, or on the seafloor, they are extrusive igneous rocks. If this happens deep underground, they are intrusive igneous rocks. Most igneous rocks have a crystalline texture, but some are clastic, vesicular, frothy, or glassy. Basalt is a common extrusive igneous rock. Basalt is the dominant rock in Earth’s upper oceanic crust. Black lava rocks seen at famous volcanoes such as Mt. Kilauea in Hawaii and Mt. Etna in Sicily are composed of basalt. Basalt has a mafic chemistry. Mafic igneous rocks are generally dark-colored, have 45-52% silica (= SiO2 chemistry) (mafic has also been defined as 45 to 55% silica), are rich in iron (Fe), magnesium (Mg), & calcium (Ca), and are dominated by the minerals plagioclase feldspar and pyroxene. Basalt has an aphanitic texture (finely crystalline; all or almost all crystals are <1 mm in size), which forms by relatively quick cooling of lava. Some basalts are porphyritic or coarsely crystalline if the lava flow took time to cool & solidify (e.g., some Proterozoic basalt lavas in the Keweenaw Peninsula of Michigan's Upper Peninsula). |
| Data | |
| Font | Basalt 3 |
| Autor | James St. John |
Publicat jos licéncia(s)
- Sètz liure :
- de partejar – de copiar, distribuir e transmetre aquesta òbra
- d'adaptar – d'adaptar aquesta òbra
- Jos las condicions seguentas :
- atribucion – Vos cal atribuir aquesta òbra amb lo biais especificat per l'autor o lo concedent (mas pas dins un sens que suggerís que vos apròvan o qu'apròvan l'utilizacion d'aquesta òbra).
|
Cette image a été originellement postée sur Flickr par James St. John à l'adresse https://flickr.com/photos/47445767@N05/48674276863. Elle a été passée en revue le 10 octobre de 2019 par le robot FlickreviewR 2, qui a confirmé qu'elle se trouvait sous licence cc-by-2.0. |
Istoric del fichièr
Clicar sus una data e una ora per veire lo fichièr tal coma èra a aqueste moment
| Data e ora | Miniatura | Dimensions | Utilizaire | Comentari | |
|---|---|---|---|---|---|
| actual | 10 octobre de 2019 a 00.13 | | 2 077×2 100 (3,43 Mo) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
Paginas que contenon lo fichièr
La pagina çaijós compòrta aqueste imatge :
Usatge global del fichièr
Los autres wikis seguents utilizan aqueste imatge :
- Utilizacion sus ca.wikipedia.org
.jpg){kind=link}