The Monts Dore (French pronunciation: ​[mɔ̃ dɔʁ]) are the remnant peaks of a volcanic massif situated near the center of the Massif Central, in the Auvergne region of France. They form a picturesque mountainous region, dotted with lakes, thermal springs and romanesque churches. The massif is an integral part of the Parc des Volcans d'Auvergne, and is known for its alpine ski areas and hiking trails.

Monts Dore
Peaks in the northern Monts Dore
Highest point
Elevation	1,885 m (6,184 ft) at Puy de Sancy
Coordinates	45.53°N 2.81°E / 45.53; 2.81
Geography
Location	Auvergne, France
Parent range	Massif Central
Geology
Age of rock	200,000 to 3 million years
Mountain type	stratovolcano, lava domes, and maars
Last eruption	before 200,000 years ago

Geology

The massif is much older than the nearby chaîne des Puys, dating to the end of the Tertiary era. It is a deeply eroded stratovolcano, similar to the Cantal massif to the south, but more reduced in area and volume. Its history began about 3 million years ago with a Plinian eruption that created a large caldera, the contours of which are no longer clearly defined. This eruption resulted in the emission of ignimbrite rhyolitic pumice that covered over 100 km² (39 sq mi) of land. Afterwards, phonolite domes were created on the exterior of the caldera. A period of calm lasting between 1 and 1.5 million years ensued, succeeded by a second major eruptive period that formed the modern Puy de Sancy, the highest peak in the Massif Central, followed by the establishment of smaller domes, dikes, and maars.

The region is dotted with lakes of volcanic origin. Some are maars that have been filled with water, while others are the result of streams whose courses have been blocked by volcanic activity.

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