Close
Cart (0)
Login
Staff Login
Register
FR
0
Selected
Invert selection
Deselect all
Deselect all
Click here to refresh results
Click here to refresh results
Go to Login page
Library
/
Digital Services
/
Science
/
Geoscience
/
Sample Folders
/
Phyllite samples
/
Phyllite samples
Zoom view
Loading details...
Linked assets
Conceptually similar
Phyllite samples
Phyllite samples
Phyllite samples
Schist sample
Schist sample
Schist sample
Schist sample
Schist sample
Schist sample
Schist sample
Slate sample
Slate sample
Gneiss samples
Gneiss samples
Gneiss samples
Gneiss samples
Gneiss samples
Gneiss samples
Marble sample
Marble sample
Similar tones
Phyllite samples
Phyllites are foliated metapelites of a shale or mudstone protolith that has been subjected to low-grade regional metamorphism. They are characteristic of being fine-grained with a vitreous, submetallic lustre and are primarily composed of quartz, feldspar, and micaceous minerals. Phyllite is higher grade than slate, differentiated by its silkier sheen and slightly coarser minerals, phyllite exhibits a slaty cleavage of parallel and fissile foliation perpendicular to a dominant direction of stress. This is due to the recrystallization of clay minerals into platy micas, indicated by the green markers and red arrows. Phyllites can also exhibit crenulation which is further indicative of multiple directions of stress imposed during metamorphism and is shown by the blue markers. Crenulation superimposes the foliation and cleavage planes as a wavy texture. Following the general evolution of metamorphosed shale into slate and phyllite, schist is the subsequent rock of increasing grade which exhibits similar characteristics as phyllite. However, due to higher metamorphic intensity, schists characteristically have much coarser crystals, weaker parallel foliation alignment, and are subjected to more deformational folding (see Schist sample). Metamorphism may also often subject phyllites to the growth of index minerals, such as biotite, garnet, andalusite, and staurolite, typically occurring as porphyroblasts and indicative of metamorphic grade.
Add to Lightbox
Download
Get link
Ask a Question
Digitized Date
10/01/2018
Creator
Dolphin, Glenn
Digital Publisher
Calgary : University of Calgary
Country
Canada
Province
Alberta
Municipality
City of Calgary
How can you use this image?
Permitted uses are outlined in License and Usage Rights. Usage Restrictions can only be waived by the copyright holder. Add to cart and make a request if you have any questions.
Usage Rights
Commercial
,
Education
,
Exhibition
,
Instruction
,
Private study
,
Publication
,
Remix and adapt
,
Research
Copyright Status
In copyright
License URL
https://creativecommons.org/licenses/by/4.0
Attribution
"Phyllite samples", 2018, (CU124478) by , is used under . Courtesy of Collection, Libraries and Cultural Resources Digital Collections, University of Calgary.
Unique identifier:
CU124478
Legacy Identifier:
20190213_geoimage_Dolphin_e._0053
Type:
Geoscience Image
Size:
5184px × 3456px 78MB