Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
cobble
References
Images
A chart categorizes common textural terms for rocks by grain size in millimeters, dividing them into igneous and metamorphic, sedimentary, and pyroclastic types, with terms like phaneritic, sand, silt, breccia, and ash shown in relation to size.
Britannica AI Icon

cobble

rock
Written by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica
Last updated

Quick Summary

A chart categorizes common textural terms for rocks by grain size in millimeters, dividing them into igneous and metamorphic, sedimentary, and pyroclastic types, with terms like phaneritic, sand, silt, breccia, and ash shown in relation to size.
rock textural terms

A cobble is a naturally rounded stone that is larger than a pebble but smaller than a boulder. Cobble gravel specifically refers to gravel containing rounded rock fragments typically ranging from 64 to 256 millimeters in diameter. These stones, along with pebbles and boulders, are all types of gravel, which is an aggregate of more or less rounded rock fragments coarser than sand. The rounding of these stones occurs through abrasion during transport by water, such as in streams or by the sea. Cobblestones have historically been used for paving streets and in construction.123

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
3 Britannica Sources
  1. cobble gravel
  2. cobblestone
  3. gravel

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.