Ridge in the context of "Drainage basin"

A drainage divide, water divide, ridgeline, watershed, water parting or height of land is elevated terrain that separates neighboring drainage basins. On rugged land, the divide lies along topographical ridges, and may be in the form of a single range of hills or mountains, known as a dividing range. On flat terrain, especially where the ground is marshy, the divide may be difficult to discern.

A triple divide is a point, often a summit, where three drainage basins meet. A valley floor divide is a low drainage divide that runs across a valley, sometimes created by deposition or stream capture. Major divides separating rivers that drain to different seas or oceans are continental divides.

The most isolated major summits of Europe by topographic isolation are located in the European continent and its tectonic and geographic boundaries. This includes major mountain peaks of fold and fault-block mountains, and also volcanoes, located not only in the European Mainland, but also those located on lands and islands on the limits of Europe, like the North Atlantic Ocean islands of the Azores and Iceland, the Arctic Ocean islands of Jan Mayen, Svalbard archipelago and Novaya Zemlya archipelago, the Mediterranean island of Sicily, the Ural Mountains, and Mount Elbrus. The last mentioned is HP of the transboundary Caucasus Mountains and Greater Caucasus region, but as a geologically separate stratovolcano, it is entirely laying in Europe (and Russia), 20 km (12 mi) north of the main ridge of the Greater Caucasus, considered as the one that is forming the limits of Europe. The definition excludes island clearly lying on the African Plate and outside the geographic limits of Europe, like the Canaries and Madeira. The active volcano of Mount Etna is somehow on, or just outside the boundaries of the Eurasian Plate, resting on the subduction boundary where the African tectonic plate is being pushed under the Eurasian plate, but geographically is part of Europe, and is also included in the Top 10 lists.

In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water close to the surface or above it, which poses a danger to navigation. Shoals are also known as sandbanks, sandbars, gravelbars, or bars. Two or more shoals that are either separated by shared troughs or interconnected by past or present sedimentary and hydrographic processes are referred to as a shoal complex.

The term shoal is also used in a number of ways that can be either similar to, or quite different from, how it is used in geologic, geomorphic, and oceanographic literature. Sometimes, the term refers to either any relatively shallow place in a stream, lake, sea, or other body of water; a rocky area on the seafloor within an area mapped for navigation purposes; or a growth of vegetation on the bottom of a deep lake, that occurs at any depth, or is used as a verb for the process of proceeding from a greater to a lesser depth of water.

Zealandia (pronounced /ziːˈlændiə/), also known as Te Riu-a-Māui (Māori) or Tasmantis (from Tasman Sea), is an almost entirely submerged mass of continental crust in Oceania that subsided after breaking away from Gondwana 83–79 million years ago. It has been described variously as a submerged continent, continental fragment, and microcontinent. The name and concept for Zealandia was proposed by Bruce Luyendyk in 1995, and satellite imagery shows it to be almost the size of Australia. A 2021 study suggests Zealandia is over a billion years old, about twice as old as geologists previously thought.

By approximately 23 million years ago, the landmass may have been completely submerged. Today, most of the landmass (94%) remains submerged beneath the Pacific Ocean. New Zealand is the largest part of Zealandia that is above sea level, followed by New Caledonia.

Mycale (/ˈmɪkəli/) also Mykale and Mykali (Ancient Greek: Μυκάλη, Mykálē), called Samsun Dağı and Dilek Dağı (Dilek Peninsula) in modern Turkey, is a mountain on the west coast of central Anatolia in Turkey, north of the mouth of the Maeander and divided from the Greek island of Samos by the 1.6 km wide Mycale Strait. The mountain forms a ridge, terminating in what was known anciently as the Trogilium promontory (Ancient Greek Τρωγίλιον or Τρωγύλιον). There are several beaches on the north shore ranging from sand to pebbles. The south flank is mainly escarpment.

In classical Greece nearly the entire ridge was a promontory enclosed by the Aegean Sea. Geopolitically it was part of Ionia with Priene placed on the coast on the south flank of the mountain and Miletus on the coast opposite to the south across the deep embayment into which the Maeander River drained. Somewhat further north was Ephesus.

A mountain chain is a row of high mountain summits, a linear sequence of interconnected or related mountains, or a contiguous ridge of mountains within a larger mountain range. The term is also used for elongated fold mountains with several parallel chains ("chain mountains").

While in mountain ranges, the term mountain chain is common, in hill ranges a sequence of hills tends to be referred to a ridge or hill chain.