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"Avantor"

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Soil, Horizon A

Specially selected topsoil, 1 lb.

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Soil, Horizon C

Specially selected subsoil, 1 lb.

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Sediment Comparators

Sediment Comparators

Without Glued-On Grains That Wear Off, Chart Stands up to Repeated use.

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Ward's Science Essentials® Sandstone

Ward's Science Essentials® Sandstone

Clearance

Red clastic rock composed of sand sized particles and hematite.

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Ward's Science Essentials® Limestone

Ward's Science Essentials® Limestone

Clearance

Limestone is a gray calcium carbonate that will fizz with dilute HCl.

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Ward's Science Essentials® Siltstone

Ward's Science Essentials® Siltstone

Clearance

Gray to tan clastic rock made of silt sized particles.

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Ward's Science Essentials® Breccia

Ward's Science Essentials® Breccia

Clearance

Breccia is a sedimentary rock made up of angular rock fragments.

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Ward's Science Essentials® Bituminous Shale

Ward's Science Essentials® Bituminous Shale

Clearance

Bituminous rich black shale for hands-on investigations.

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Ward's Science Essentials® Tufa

Ward's Science Essentials® Tufa

Clearance

Carbonate rock formed by the precipitation from water.

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Ward's Science Essentials® Scoria

Ward's Science Essentials® Scoria

Clearance

Scoria is a dark-colored rock formed from lava with a high gas content.

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Ward's Science Essentials® Conglomerate

Ward's Science Essentials® Conglomerate

Clearance

Conglomerate is a sedimentary rock made up rounded quartz pebbles.

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