There are many granulometric scales in use, but the Udden-Wentworth scale (commonly known as the Wentworth scale) is the most widely used in geology.

Rite In The Rain Transit Polydura Bound Notebook # 300. Rite in the Rain® field books allow you to work efficiently in any weather and still protect your valuable data.

Rite In The Rain Field 350 Polydura Bound Notebook. This is a 4 3/4 "x 7 1/2" hard cover polydura field book on stitched pages.

Get the same rite in the rain quality with 4-5 / 8 '' x 7 '' replacement sheets that fit No. 200 and No. 210 ring binders.

Mylar waterproof paper sheets for drawing and geological mapping.

The small rite in the rain # 204 ring binders are durable. Made of polydura and rust resistant metals. This small size binder is designed to fit 4 "x 6 1/2" replacement sheets.

Ideal for field work performed by professionals in geology and mining. It incorporates sixteen pages of geological information, including: grain size scales, soil classification, geological map symbols, rock classification diagrams, geological...

15 CM PLASTIC SCALIMETER WITH 12 STANDARDGRAPH SCALES

Size - 36 in x 500 ft roll weight - 33.25 lbs. Patented large format rite in the rain xerographic paper for drawings and specifications. No more laminating your important documents to use on your project. All weather paper.

Tungsten carbide-tipped pencil for estimating the relative hardness of minerals; it also consists of a permanent magnet to establish magnetic minerals.