Clermont-Ferrand Cathedral
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Clermont-Ferrand Cathedral, or the Cathedral of Our Lady of the Assumption of Clermont-Ferrand, is a Gothic cathedral and French national monument located in the city of Clermont-Ferrand in the Auverg
Clermont-Ferrand Cathedral from Montjuzet Park in April 2006.
The western front
Interior of the cathedral
View from the south. The black Gothic cathedral towers above the city with its dominating spires 96.1 metres high.
Volcanic rock
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Volcanic rocks are rocks formed from lava erupted from a volcano. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic ro
Clermont-Ferrand Cathedral
…in the city of Clermont-Ferrand in the Auvergne. It is the seat of the Archbishops of Clermont (bishops until 2002). It is built entirely in black lava stone, which makes it highly distinctive and visible from a great distance. Its twin spires are 96.1 metres tall, and tower above the city's rooftops. It has…
Ignimbrite, a volcanic rock deposited by pyroclastic flows
Photomicrograph of a volcanic lithic fragment (sand grain); upper picture is plane-polarized light, bottom picture is cross-polarized light, scale box at left-center is 0.25 millimeter.
An aphanitic volcanic sand grain, with fine-grained groundmass, as seen under a petrographic microscope
Vesicular olivine basalt from La Palma (green phenocrysts are olivine).