Quartz-kaolin sandstone

Specimen Summary

This sample is a light grey to white, “salt-and-pepper” textured sandstone composed of 1–2 mm grains of quartz and kaolin (kaolinite) clasts. The grains were originally produced by explosive fragmentation of rhyolite (a silica-rich volcanic rock), then reworked and sorted by fluvial (stream) processes into a quartz-dominated sandstone with a significant kaolin component. Rhyolitic explosive eruptions generate abundant fine to coarse siliciclastic debris; weathering and hydrothermal alteration of feldspars and volcanic glass in such debris commonly yield kaolinite. Stream reworking sorts the mixed quartz + kaolin detritus into a sandstone, preserving a bimodal light (quartz) and slightly duller/whiter (kaolin-rich) “salt-and-pepper” appearance. This is a clastic sedimentary rock — quartz-rich sandstone with kaolin (kaolinite) matrix/clasts, derived from reworked rhyolitic volcaniclastics.

Specimen Data

 

The information listed below relates to the current holding location or collection that the sample is from, and whether the item is viewable at that location or is part of a private collection. Coordinates are given as guides, and we remind you that collecting specimens from these locations is not allowed. Caution is advised visiting such sites and Below BC assumes no responsibility for any injuries or trespassing charges that may occur as a result of the viewer entering these sites.

Collection Details

Original Collection:

Smithers Exploration Group (SEG)

Sub Collection:

Explosive Silicic Volcanics

Collection ID:

V2-18a-redone

Virtual Museum ID:

19-V2-18a

Accessibility:

Date Added to VM:

2019-02-20

Location Information

Sample Origin:

Smithers, BC

Specific Site:

NE Arrow Lk, Nechako area

UTM Easting:

618466

UTM Northing:

6071559

Datum:

09 (NAD 83)

Coordinate Accuracy:

Specimen Details

VM Category:

Rock

Primary Features:

Quartz-kaolin sandstone

Primary Mineral Formula:

SiO2 · Al 2(OH) 4Si 2O 5

Primary Category:

Secondary Features:

-

Advanced Geological Information

 

The following section provides geological data relating to the specimen or the site it was collected from, when available. Information has been obtained from various sources including private and government datasets but may not be up to date. Any geological time periods or ages listed often relate to the primary geology of the area, and may not be the actual date of an event such as mineral formation.

Geological Formation:

Clastic sedimentary rock

Geological Period:

N/A

Stratigraphic Age:

N/A

Geological Belt:

N/A

Geological Terrane:

N/A

Minfile ID:

N/A

Minfile Link:

N/A

Site Details:

N/A

Additional Images