This document provides a standardized set of lithologic patterns for depicting rock units on geologic maps and stratigraphic columns. It includes over 70 patterns for sedimentary rocks …
A-38-1 of the "FGDC Digital Cartographic Standard for Geologic Map Symbolization" (available at http://ngmdb.usgs.gov/fgdc_gds/). For guidelines on selecting patterns, see Section 5, entitled …
2014年9月24日 · Below are examples of the symbols used in geologic diagrams and maps to represent specific kinds of rocks. If bedding, cross-bedding, ripples, fossils, distortion, or …
Calcirudite is a type of limestone that is composed predominately, more than 50 percent, of carbonate grains that are larger in size than sand (2 mm in diameter). The most common …
Lithologic Patterns and Symbols Used On Kentucky Geologic Quadrangle Maps Dolomitic siltstone Calcareous siltstone Silt, siltstone, or silt shale Argillaceous or shaly sandstone ...
2017年7月15日 · This repository contains the FGDC library of 480 map and lithologic patterns extracted to SVG and PNG, for use on the modern web. This can be paired with other …