Fasciculus:Pillow basalts & jasper (Franciscan Complex, Jurassic; Point Bonita, California, USA) 1 (40298109333).jpg
Sua resolutio (3 008 × 2 000 elementa imaginalia, magnitudo fasciculi: 4.86 megaocteti, typus MIME: image/jpeg)
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Summarium
| Descriptio |
Pillow basalts in the Jurassic of California, USA. The bulbous, rounded masses of volcanic rock seen here are pillow basalts. The morphology is diagnostic of underwater lava eruptions. These rocks are part of the Franciscan Complex - they represent the top portion of Jurassic-aged oceanic crust. This basaltic crust originally formed at an ancient mid-ocean ridge and got plastered onto the edge of the North American continent along a now-inactive subduction zone. The upper portions of the subducting oceanic slab (the Farallon Plate) got scraped off to form an accretionary wedge. The dark red areas are red chert, also known as jasper. The basalts have been metamorphosed into greenstone, but much of the outcrop is still dark gray to black in color. Stratigraphy: Franciscan Complex, Jurassic Locality: Point Bonita, southwestern tip of the Marin Peninsula, Golden Gate National Recreation Area, north of San Francisco, coastal-western California, USA |
| Datum | |
| Fons | Pillow basalts & jasper (Franciscan Complex, Jurassic; Point Bonita, California, USA) 1 |
| Auctor | James St. John |
Potestas usoris
- Tibi licet:
- communicare – copiare, distribuere et committere hoc opus
- to remix – to adapt the work
- His condicionibus:
- attributio – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40298109333 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
Historia fasciculi
Presso die vel tempore fasciculum videbis, sicut tunc temporis apparuit.
| Dies/Tempus | Minutio | Dimensiones | Usor | Sententia | |
|---|---|---|---|---|---|
| recentissima | 00:22, 10 Octobris 2019 | | 3 008 × 2 000 (4.86 megaocteti) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
Nexus ad fasciculum
Ad hunc fasciculum nectit:
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