Skip to main content
An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

NALT Concept Space
U.S. Department of Agriculture

NALT Full

Concept information

  1. Fields of Study
  2. soil morphology
  3. soil morphological features
  4. soil horizons
  5. hardpans
  6. duripans
  1. Fields of Study
  2. soil
  3. soil morphological features
  4. soil horizons
  5. hardpans
  6. duripans

Preferred term

duripans

Type

  • Topic

Definition

  • Information A duripan (L. durus, hard; meaning hardpan) is a subsurface horizon that is cemented by illuvial silica to the degree that less than 50 percent of the volume of air-dry fragments slake in water or during prolonged soaking in acid HCl). Duripans vary in the degree of cementation by silica. In addition, they commonly contain accessory cements, chiefly calcium carbonate.

    Source: US, Environmental Protection Agency

    Type: Concept definition

Broader concept

Related concepts

In other languages

URI

https://lod.nal.usda.gov/nalt/306927

Download this concept:

RDF/XML TURTLE JSON-LD Created 8/16/17, last modified 11/10/17