lobate delta

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

June 30, 2026

Quick Summary

A lobate delta is a type of high-constructive delta that forms when river depositional processes dominate over marine forces. These deltas are characterized by a broad, rounded shape, resembling a lobe, and typically occur when there is a large supply of sediment relative to the wave and tidal energy along the shoreline.1

Unlike elongate deltas, which are also high-constructive, lobate deltas are exemplified by older Holocene deltas of the Mississippi River system. The term "lobate" itself means having lobes. These deltas are built by the river's sediment load being deposited more rapidly than it can be dispersed by ocean currents.123

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

5 Britannica Sources

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.

river
Classification of deltas
The other, called lobate, is exemplified by the older Holocene deltas of the Mississippi River system. Both of these high-constructive types have a large sediment supply relative to the marine processes that tend to disperse sediment along the shoreline. Normally, elongate deltas have a higher mud content than…
Read More
The other, called lobate, is exemplified by the older Holocene deltas of the Mississippi River system. Both of these high-constructive types have a large sediment supply relative to the marine processes that tend to disperse sediment along the shoreline. Normally, elongate deltas have a higher mud content than…
Read More