Beach Sand, Oregon, USA
|
|
|
Erosive coast near Florence, Oregon |
Macro |
Location: |
near Florence, Oregon |
Depositional facies: |
High-energy, erosive beach |
Provenance: |
Magmatic arc, low-grade metamophic rocks |
Composition: |
Quartz (likely from PRF), andesitic and basaltic VRF, a few dioritic PRF and subvolcanic and low-grade MRF |
Texture: |
medium-grained, rounding moderately to godd (depending on mineral hardness), very well sorted |
Petrographic thin section:
Description: |
clear monocrystalline quartz in thin section (volc?), VRF, ch, silt (brown, rounded), hints of resolution embayments, accessory amph, epi, silicified VRF, zoned plag |
|
|
|
Bright field |
Dark field |
Sample number |
Heubeck0002 |
Collector |
Christoph Heubeck, Institut für Geologische Wissenschaften, FU Berlin |
Date of sampling |
1999 |
Comments:
A typical composition of a sand from a partly eroded magmatic arc on continental crust, exposing volcanic, metamorphic and plutonic rocks. Coastal photo from www.geocities.com/harald_nancy/oregon_coast.htm
