The Cascade Peaks are three summits in the

Monte Perdido Range Monte Perdido (in Spanish; Mont Perdu in French; Mont Perdito in Aragonese;all four meaning ''lost mountain'') is the third highest mountain in the Pyrenees. The summit of Monte Perdido (3355 m), located in Spain, lies hidden from France b ...

of the

Pyrenees The Pyrenees (; es, Pirineos ; french: Pyrénées ; ca, Pirineu ; eu, Pirinioak ; oc, Pirenèus ; an, Pirineus) is a mountain range straddling the border of France and Spain. It extends nearly from its union with the Cantabrian Mountains to ...

, culminating at on the eastern peak. The central peak, known as Brulle, and the western peak are and high, respectively. The peaks are located on the 3,000 m French-Spanish borderline crest.

Toponymy

The central summit was named in honor of Henri Brulle.

Geography

The peaks are part of the Monte Perdido Range above the

Cirque de Gavarnie __NOTOC__ The Cirque de Gavarnie is a cirque in the central Pyrenees, in Southwestern France, close to the border of Spain. It is within the commune of Gavarnie, the department of Hautes-Pyrénées, and the Pyrénées National Park. Major feat ...

. The peaks are located in the Hautes-Pyrénées department, in the

Midi-Pyrénées Midi-Pyrénées (; oc, Miègjorn-Pirenèus or ; es, Mediodía-Pirineos) is a former administrative region of France. Since 1 January 2016, it has been part of the new region of Occitania. It was the largest region of Metropolitan France by ar ...

region of France, and in

Huesca Huesca (; an, Uesca) is a city in north-eastern Spain, within the autonomous community of Aragon. It is also the capital of the Spanish province of the same name and of the comarca of Hoya de Huesca. In 2009 it had a population of 52,059, almo ...

province, in the Aragon region of Spain.

Geology

The summit is composed of massive algae

sediment Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sa ...

s, miliolitic sediments (

eolianite Eolianite or aeolianite is any rock formed by the lithification of sediment deposited by aeolian processes; that is, the wind. In common use, however, the term refers specifically to the most common form of eolianite: coastal limestone consisting ...

) and

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...

sediments from the

Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...

and Oligocene periods.

References

{{Reflist Mountains of the Pyrenees Mountains of Hautes-Pyrénées Mountains of Aragon Pyrenean three-thousanders