Types of Plateaus: Formation, Features and Examples

Plateaus are raised landforms with broad, fairly level surfaces. They can be grouped by how they formed, by how erosion has reshaped them, and by where they sit in relation to mountains and continental interiors. The main types include volcanic, dissected, intermontane, piedmont, continental, tectonic, erosional or denudation, and oceanic plateaus.

A plateau does not always fit only one label. A volcanic plateau can later become dissected by rivers, while an intermontane plateau may also owe much of its elevation to tectonic uplift. For that reason, plateau types work best as descriptions of origin, present shape, or geographic setting rather than as mutually exclusive boxes.

What Makes a Landform a Plateau?

A plateau is generally a broad area of elevated land that stands above nearby terrain. Its upper surface may be flat, gently rolling, or deeply cut by valleys. The margins may appear as cliffs, escarpments, canyon rims, mountain fronts, or gradual slopes.

Many plateaus look rugged from the ground. Rivers can cut deep valleys across them, volcanic layers can create stepped slopes, and smaller ranges may rise from the surface. What keeps the landform in the plateau category is the larger elevated surface that can still be recognized across the region.

Three basic traits help separate a plateau from nearby landforms:

• Height: The region stands above surrounding terrain.
• Surface: The upper area is broad rather than a narrow ridge or isolated summit.
• Edge: There is a transition from the high surface toward lower land, whether steep or gradual.

Two Ways to Classify Plateaus

Plateau names do not all describe the same kind of trait. Some names refer to the process that built or raised the land, while others refer to present shape or geographic position.

Classification by Origin or Surface History

• Tectonic: Broad crustal uplift, deformation, or crustal thickening raises the land.
• Volcanic: Lava or other volcanic material builds a broad elevated surface.
• Dissected: Rivers and erosion cut deeply into an existing plateau surface.
• Erosional or denudational: Long erosion removes surrounding material and leaves or exposes a higher resistant surface.

Classification by Geographic Setting

• Intermontane: Inside or between mountain ranges.
• Piedmont: At the foot of a mountain system.
• Continental: Across a broad continental interior or interior upland.
• Oceanic: Beneath the ocean as a large raised part of the seafloor.

Volcanic Plateaus

A volcanic plateau is a broad elevated surface built largely from volcanic material spread across a wide area. It differs from a volcanic cone because the landform extends laterally across a large region rather than rising mainly around one central vent. The Columbia Plateau in the northwestern United States is a well-known example. Volcanic plateaus may later be cut by rivers, so volcanic origin does not prevent the same landform from also becoming dissected.

Read Volcanic Plateau: Meaning, Formation and Examples for the eruption styles, lava layers, rock types, morphology, identification clues, and regional examples.

Dissected Plateaus

A dissected plateau is a raised surface that has been cut into valleys, canyons, ridges, mesas, or other remnants by rivers and long erosion. The term describes the present shape of the land rather than one specific origin. The Colorado Plateau is a familiar example because large areas of its elevated surface are divided by deeply incised river systems. A dissected plateau may have started as a tectonic, volcanic, or older erosional surface.

Read Dissected Plateau: Meaning, Erosion and Examples for erosion processes, drainage development, landform patterns, identification, and individual examples.

Intermontane Plateaus

An intermontane plateau is defined mainly by location: it lies within or between major mountain ranges. These plateaus are often high because many occur in regions affected by mountain building and crustal thickening, but their defining trait is their mountain-enclosed setting. The Tibetan Plateau is the best-known example. Intermontane plateaus can contain broad basins, river valleys, ranges, lakes, and internally drained areas within the wider elevated region.

Read Intermontane Plateau: Meaning, Formation and Examples for mountain-building processes, basin development, climate effects, morphology, and major examples.

Piedmont Plateaus

A piedmont plateau lies at the foot of a mountain system and forms a transition between higher mountains and lower plains, basins, or coastal lowlands. The surface commonly slopes away from the mountain front rather than being enclosed by ranges on several sides. The Appalachian Piedmont of the eastern United States is a familiar example of a broad upland between the Appalachian Mountains and the Atlantic Coastal Plain.

Piedmont classification is based mainly on geographic setting. A piedmont surface may also show tectonic uplift, long erosion, river incision, or other processes that describe its geologic history more precisely.

Continental Plateaus

A continental plateau is a broad upland that occupies part of a continental interior. It is not defined by one single rock type or one formation process, and many continental plateaus have long histories involving uplift, erosion, river incision, and older crustal surfaces. The Central Siberian Plateau is a representative example. The term is most useful when distinguishing broad interior uplands from plateaus enclosed by mountain belts or positioned directly at mountain fronts.

Read Continental Plateau: Meaning and Examples for formation histories, physiographic traits, regional variation, and individual continental plateaus.

Tectonic Plateaus

A tectonic plateau is an elevated region whose height is tied mainly to broad crustal uplift, deformation, or thickening. Unlike “intermontane,” which describes position, “tectonic” describes the process that raised the land. The same plateau can therefore be both tectonic and intermontane. The Tibetan Plateau is commonly used to show this overlap because its setting is within major mountain systems while its elevation is closely tied to large-scale tectonic processes.

Read Tectonic Plateau: How Uplift Creates High Flatlands for uplift mechanisms, crustal deformation, surface response, tectonic settings, and examples.

Erosional and Denudation Plateaus

An erosional or denudation plateau is associated with long-term removal of rock and weathered material. In some regions, resistant surfaces remain high while surrounding terrain is lowered; in others, erosion exposes an older elevated surface. The Chota Nagpur Plateau is often discussed as an old eroded upland. This category can overlap with dissected plateaus because both involve erosion, but “dissected” emphasizes valley cutting into a plateau, while denudation refers to wider landscape lowering and stripping.

Oceanic Plateaus

An oceanic plateau is a broad, raised region of oceanic crust that stands above the surrounding seafloor. It belongs to the plateau family because of its large elevated surface, but it is studied through bathymetry and marine geology rather than ordinary land topography. The Ontong Java Plateau in the western Pacific is one of the best-known examples. Oceanic plateaus should not be confused with coastal plateaus, which are land surfaces near continental margins.

How the Main Plateau Types Differ

The fastest way to separate the main categories is to identify what the label is describing. A type may point to origin, present surface form, or position.

How Plateaus Shape Rivers and Basins

Plateaus influence drainage because water moves from elevated surfaces toward lower terrain. Rivers may begin on a plateau, cross it, cut into it, or flow outward from its margins. In enclosed high plateaus, drainage may end in lakes, salt flats, or internal basins rather than reaching the sea.

Three drainage patterns are common across plateau regions:

• Outward drainage: Rivers flow away from the elevated surface toward lower surrounding land.
• Internal drainage: Water collects in enclosed basins, lakes, or salt flats.
• Incised drainage: Rivers cut deeply into the plateau and create steep valleys or canyons.

The type label alone does not determine the drainage pattern. A volcanic plateau can be deeply incised, an intermontane plateau can contain internal basins, and a continental plateau can drain through large river systems extending far beyond its margins.

How Plateaus Affect Climate and Landscapes

Elevation often makes plateau climates cooler than nearby lowlands, but altitude is only one control. Latitude, distance from the sea, surrounding mountains, prevailing winds, and regional dryness also shape conditions on the plateau surface.

Plateau settings can therefore differ sharply:

• High and cold: Tibetan Plateau and Altiplano.
• Dry and continental: Iranian Plateau and Arabian Plateau.
• Volcanic: Deccan and Ethiopian highland regions include extensive volcanic terrain.
• Canyon-cut: Colorado Plateau shows deep river incision across an elevated surface.
• Old and weathered: Western Plateau of Australia includes very old upland landscapes.

These physical differences also affect land use. River valleys may provide water and transport corridors, volcanic rocks can weather into productive soils in some climates, and steep escarpments or deeply cut canyons can limit direct routes across a plateau.

Plateau Types Compared with Similar Landforms

Plateaus can be confused with mountains, plains, mesas, buttes, basins, and highlands because several of these landforms may occur together. The distinction depends on scale, relative height, upper-surface shape, and the relationship between the feature and surrounding terrain.

How to Identify a Plateau Type on a Map

A map can help identify whether a plateau label is based on shape, origin, or position. Elevation alone is not enough. The surrounding mountain pattern, river network, surface geology, and edge form provide additional clues.

Check the Elevation Pattern

A plateau usually appears as a broad area that remains higher than nearby terrain. Closely packed contours may mark steep margins, while wider spacing across the top can show gentler interior relief. Deep valleys inside the high area do not automatically rule out a plateau.

Look at the Surrounding Landforms

A plateau enclosed by major mountain systems may be intermontane. One positioned along the foot of a mountain range may be piedmont. A very broad inland upland may be described as continental.

Read the River Pattern

Deeply incised rivers cutting a once broader elevated surface point toward dissection. Internal drainage, lakes, or salt flats may be common in some high intermontane settings, while outward-flowing rivers can drain plateaus toward distant lowlands.

Use Geology for Origin-Based Types

Map position cannot by itself prove that a plateau is volcanic or tectonic. Geological information is needed to determine whether widespread volcanic deposits built the surface or whether broad crustal uplift played the main role in raising it.

Why One Plateau Can Have More Than One Type

Plateau labels often overlap because they describe different parts of the same geographic story. One label may explain origin, another may describe present shape, and a third may describe position.

• The Colorado Plateau is an elevated regional plateau that has been strongly dissected by rivers.
• The Columbia Plateau is volcanic in origin and has also been cut by major river systems.
• The Tibetan Plateau is intermontane by position and tectonic in origin.
• The Deccan Plateau includes extensive volcanic basalt terrain within a much larger regional plateau.
• The Altiplano is an intermontane high plateau with broad basins and mountain margins.

This overlap is expected. The most useful classification depends on whether the question concerns formation, surface shape, or geographic setting.

Mini Glossary of Plateau Type Terms

FAQ

What are the main types of plateaus?

The main plateau types include volcanic, dissected, intermontane, piedmont, continental, tectonic, erosional or denudation, and oceanic plateaus. These labels do not all describe the same property: some refer to origin, some to present shape, and others to geographic setting.

What is the difference between a volcanic plateau and a dissected plateau?

A volcanic plateau is classified by origin because widespread volcanic material helped build the elevated surface. A dissected plateau is classified by present shape because rivers and erosion have cut deeply into the surface. One plateau can belong to both categories.

What is the difference between an intermontane plateau and a tectonic plateau?

Intermontane describes position within or between mountain ranges. Tectonic describes the crustal processes that raised a plateau. A highland such as the Tibetan Plateau can therefore be both intermontane and tectonic.

Can a plateau have mountains on it?

Yes. A plateau can contain smaller mountain ranges, hills, volcanic cones, basins, valleys, and canyons as long as the wider region remains a broad elevated surface.

Can a volcanic plateau become dissected?

Yes. A plateau may first be built by volcanic material and later be cut by rivers and erosion. In that case, “volcanic” describes its origin while “dissected” describes its later surface form.

How can you tell what type of plateau is shown on a map?

Start with the plateau’s position relative to mountains and lowlands, then examine river incision, elevation patterns, and available geological information. Position helps identify intermontane, piedmont, or continental settings, while geology is needed for origin-based labels such as volcanic or tectonic.