Clay

Clay-rich Lake Superior sediment core.

Clay Open Unique ID page
[no image] Site name: Superior
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Jess Rodysill
Notes: none


Turbidite and clay cap

Turbidite with clay cap, Twin Lake, Minnesota.

Turbidite sequence Open Unique ID page
[no image] Site name: Twin Lake
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Jess Rodysill
Notes: none
Clay turbidite cap Open Unique ID page
[no image] Site name: Twin Lake
Light type: Plane-Polarized Light
Magnification: 100
Submitted by: Jess Rodysill
Notes: none


Turbidite sequence

Turbidite sequence from Pettit Lake with reworked diatoms and volcanic glass.

Turbidite sequence Open Unique ID page
[no image] Site name: Pettit
Light type: Plane-Polarized Light
Magnification: 1000.0
Submitted by: Mark Shapley
Notes: none
Turbidite sequence Open Unique ID page
[no image] Site name: Pettit
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: none
Turbidite sequence Open Unique ID page
[no image] Site name: Pettit
Light type: Plane-Polarized Light
Magnification: 200.0
Submitted by: Mark Shapley
Notes: none
Turbidite sequence Open Unique ID page
[no image] Site name: Pettit
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: none


Tephra - Mazama

Mazama tephra, Pettit Lake, Idaho.

Tephra- Mazama Open Unique ID page
[no image] Site name: Pettit
Light type: Plane-Polarized Light
Magnification: 100.0
Submitted by: Mark Shapley
Notes: none
Tephra- Mazama Open Unique ID page
[no image] Site name: Pettit
Light type: Plane-Polarized Light
Magnification: 100.0
Submitted by: Mark Shapley
Notes: none


Tephra - mafic

Unidentified mafic tephra, Redfish Lake, Idaho.

Tephra - mafic Open Unique ID page
[no image] Site name: Redfish Lake
Light type: Plane-Polarized Light
Magnification: 100.0
Submitted by: Mark Shapley
Notes: volc glass, magnetite, oxide coatings, mafic minerals, feldspars


Tephra - Mount Saint Helens

Mount Saint Helens Y-series tephra, Wallowa Lake, Oregon.

Tephra - Mount Saint Helens Y Open Unique ID page
[no image] Site name: Wallowa
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: none
Tephra - Mount Saint Helens Y Open Unique ID page
[no image] Site name: Wallowa
Light type: Plane-Polarized Light
Magnification: 100.0
Submitted by: Mark Shapley
Notes: none
Tephra - Mount Saint Helens Y Open Unique ID page
[no image] Site name: Wallowa
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: none


Laminated sulfidic silt

Laminated silt with sulfide minerals, Wallowa Lake, Oregon.

Laminated sulfidic silt Open Unique ID page
[no image] Site name: Wallowa
Light type: Plane-Polarized Light
Magnification: 200.0
Submitted by: Mark Shapley
Notes: Iron-bearing silicate minerals derived from igneous rocks (flaky biotite upper left and lower right; prismatic pyroxenes top center and bottom near scale bar) are potential sources of reactive Fe contributing to iron sulfide formation in this sediment.


Tephra - Glacier Peak G and Mount St. Helens J

Glacier Peak G (30.8 - 32.5 cm) and Mount St. Helens J (36 - 36.5 cm) tephras in a Swiftcurrent Lake sediment core.

Tephra - Mt. St. Helens J Open Unique ID page
[no image] Site name: Swiftcurrent Lake
Light type: Plane-Polarized Light
Magnification: 630
Submitted by: Jess Rodysill
Notes: none
Tephra - Glacier Peak G Open Unique ID page
[no image] Site name: Swiftcurrent Lake
Light type: Plane-Polarized Light
Magnification: 630
Submitted by: Jess Rodysill
Notes: none
Tephra - Glacier Peak G Open Unique ID page
[no image] Site name: Swiftcurrent Lake
Light type: Plane-Polarized Light
Magnification: 100
Submitted by: Jess Rodysill
Notes: none


Glacial varves

Glacial varves in a Swiftcurrent Lake sediment core.

Glacial varves Open Unique ID page
[no image] Site name: Swiftcurrent Lake
Light type: Plane-Polarized Light
Magnification: 100
Submitted by: Jess Rodysill
Notes: none
Glacial varves Open Unique ID page
[no image] Site name: Swiftcurrent Lake
Light type: Plane-Polarized Light
Magnification: 100
Submitted by: Jess Rodysill
Notes: none


Diatom ooze

Diatom ooze in a Herd Lake sediment core.

Diatom ooze Open Unique ID page
[no image] Site name: Herd
Light type: Plane-Polarized Light
Magnification: 200.0
Submitted by: Mark Shapley
Notes: none
Diatom ooze Open Unique ID page
[no image] Site name: Herd
Light type: Plane-Polarized Light
Magnification: 200.0
Submitted by: Mark Shapley
Notes: none
Diatom ooze Open Unique ID page
[no image] Site name: Herd
Light type: Plane-Polarized Light
Magnification: 200.0
Submitted by: Mark Shapley
Notes: none


Vivianite

Vivianite in a Lake Desor sediment core.

Vivianite Open Unique ID page
[no image] Site name: Valles Caldera
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: atypical occurrence, near-pure vivianite. dissagregated-nodule


Carbonate mud

Carbonate mud in a Jones Lake sediment core.

Banded carbonate mud Open Unique ID page
[no image] Site name: Jones Lake
Light type: Plane-Polarized Light
Magnification: 100
Submitted by: Jess Rodysill
Notes: none
Banded carbonate mud Open Unique ID page
[no image] Site name: Jones Lake
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Jess Rodysill
Notes: none


Organic-rich diatom ooze

Organic matter and diatoms in a Haskell Lake sediment core.

Organic-rich Diatom Ooze Open Unique ID page
[no image] Site name: Waswaagining/Haskell
Light type: Plane-Polarized Light
Magnification: 100
Submitted by: Jess Rodysill
Notes: none


Peat

Vascular organic matter in a Middle Sugerbush sediment core.

Peat Open Unique ID page
[no image] Site name: Middle Sugarbush
Light type: Plane-Polarized Light
Magnification: 400
Submitted by: Jess Rodysill
Notes: none


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