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.

Field desk for geologists and professional explorers. Stores 8 1/2 x 11 in. Sheets (up to 200 sheets), pencils and other field equipment inside the durable polydura plastic housing. With a warmer feel than a conveniently lightweight and...

Universal Pattern, Yellow PolyDura Cover, 50 Sheets (100 Pages). Waterproof paper: 100 pages / 50 sheets per pocket notepad. All-weather paper doesn't get wet when wet and repels water, sweat, grease, mud and will even survive accidental...

Mylar waterproof paper sheets for drawing and geological mapping.

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.

This new edition is a revision of the previously published Geological Society of America (GSA) Rock Color Chart prepared by the Rock Color Tables Committee. Included are 115 color chips with Munsell's numerical designation to identify the rock...

The Industrial Planner in aluminum is exclusive and resistant, designed and manufactured by Synergy Supplies . With leather case for rulers and 10 compartments for pens.

These are the loose sheets that professionals use. Special 6-groove round punches fit Rite in No. 200 (43455), No. 9200 (49440), and No. 9200T (49441) Rain Ring Binders. 4-5 / 8˝ x 7˝ sheet size. Pack of 100 sheets.

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.