Extrusive Collection

Giants Causeway. Columns of basalt rock at the Giants Causeway, in County Antrim, Northern Ireland. This site has been designated a World Heritage Site

Basalt bomb
Geological specimen collected by Scotts British Antarctic Expedition 1910-1913, also known as the Terra Nova expedition. It had a broad scientific programme and collected thousands of geological

Microscope image of the Pasamonte eucrite
Microscopic image of the Pasamonte eucrite showing a basaltic texture. Field of view is 2.5mm across

Basalt column formations and rocks at coastal area, Isle of Ulva, Scotland

Main crater Irazu Volcano with rising clouds, Irazu Volcano National Park, Parque
american, black, blue sky, cartage province, cloud, crater, extrusive, Harry Laub Travel Photography, 1150996008

Moon rock fragment from the last Apollo space mission, Apollo 17, encased in perspex on a wooden plaque. The thumbnail-size rock is around 3.7 billion years old

Basalt columns, Real del Monte mine, Mexico
Engraving of a sketch by Alexander Humboldt, 1810 Date: 1810

Quartz-feldspar porphyry C016 / 6206
Quartz-feldspar porphyry. Geological specimen collected during Scotts British Antarctic Expedition 1910-1913 (also known as the Terra Nova expedition)

Tenorite mineral crystals C016 / 4933
Tenorite mineral crystals. Tenorite is a form of copper oxide. It is found as grey-to-black metallic crystals (in fibrous form here) as a by-product of lava flows

Quartz-feldspar porphyry
Geological specimen collected by Scotts British Antarctic Expedition 1910-1913, also known as the Terra Nova expedition. It had a broad scientific programme and collected thousands of geological

Plate XXXXIV: Lava Samples
Pl XXXXIV. Observation on the volcanoes of the two Sicilies, Naples, 1776 & 1779 compiled by Sir William Hamilton (1730-1803) while Ambassador to the Kingdom of Naples

Kenyte lava C016 / 6204
Kenyte lava. Geological specimen collected during Scotts British Antarctic Expedition 1910-1913 (also known as the Terra Nova expedition)

Basalt bomb C016 / 6209
Basalt bomb. Geological specimen collected during Scotts British Antarctic Expedition 1910-1913 (also known as the Terra Nova expedition). Basalt is a common volcanic rock

Agglomerate rock specimen C016 / 4936
Agglomerate rock specimen. Agglomerates form as coarse accumulations of fragments of volcanic rocks

Basaltic dyke, collected by Dr Benza in Neilgherries, India, c.1837. NHM specimen number: BM 649

Basalt tuff, collected by Dr Benza at a hillock just north of Napoleons Tomb, St Helena, c.1837. NHM specimen number: BM 861

Kenyte lava
Geological specimen collected by Scotts British Antarctic Expedition 1910-1913, also known as the Terra Nova expedition. It had a broad scientific programme and collected thousands of geological

Volcanic glass, Peles hair
Scanning electron microscope image of a sample of volcanic glass from Mt. Pele, produced to evaluate different types of laser in Laser Ablation Inductively Coupled Plasma Mass Spectrometry

Black basalt lava
This basalt lave has cooled quickly and gas bubbles have formed into balls of fragile, needle-sharp crystals of zeolite minerals

Surface of the early Earth
An impression by Barry Evans of what the surface of the Earth may have looked like when it was very young, and still forming

Volcanoes on the early Earth
This is an artists impression of volcanoes frequently active on the surface of early Earth

Submarine volcanic eruption
A submarine volcanic eruption may often produce a Tsunami or trigger earthquakes. One of a series (including image numbers 185 to 190) showing various forms of volcanic eruption

Tenorite is comprised of (copper oxide). It is found as grey to black metallic crystals and as a by-product of lava flows. Fibrous specimen from the Natural History Museum, London

Volcanic Activity
Block diagram showing various types of volcanic activity. One of a series of diagrams (including image numbers 185 to 190) showing volcanic activity

Igneous activity
A block diagram depicting various types of igneous activity. Fig 65 from The Story of the Earth (1977), a Geological Museum booklet

Lava-flow from Edinburgh volcano
A specimen of lava-flow that erupted from the haunch vent down the flanks of the volcano to its present resting place on Whinny Hill

Oceanic and continental crust
A cross section of the Earths surface showing the continental crust on the left and oceanic crust on the right. Beneath the surface layer lies the Basaltic layer (in green) and the Mantle (in grey)

Obsidian specimen

Agglomerate
An agglomerate is a rock formed of angular volcanic fragments. Specimen from Volcanoes 2nd edition fig 57 (top)

Plate XXXVIII: Lava curtain and royal party
Pl XXXVIII. Observation on the volcanoes of the two Sicilies, Naples, 1776 & 1779 compiled by Sir William Hamilton (1730-1803) while Ambassador to the Kingdom of Naples

Platyphysa prinsepi, freshwater snails
65 million year old freshwater snail specimens that were engulfed by lava flows. Originating from the Late Cretaceous, Nagpur, India

Krakatoa in eruption
Krakatoa during an early stage of the eruption. Plate 1 from The Eruption of Krakatoa (1888) by G. J. Symons

Devonian landscape
An impression by Bridget Kempster of the Old Red Sandstone desert of the Devonian period (417 to 354 million years ago)

Volcanic eruption
A flood basalt eruption. One of a series (including image numbers 185 to 190) showing various forms of volcanic eruption

Columnar basalt rock. Basalt is a fine-grained, extrusive igneous rock found in most lava flows. Its pentagonal and hexagonal geometry is due to contraction on cooling

Sample of basalt. Basalt is an extrusive (volcanic) igneous rock composed of calcic plagioclase feldspar, pyroxine, and occasionally olivine. Accessory minerals are sometimes visible

Basalt cliffs and rock stack, Halsenifs Hellir Beach, near Vik i Myrdal, South Iceland, Iceland, Polar Regions

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"Exploring the Extrusive Wonders of Our Earth and Beyond" Giants Causeway: Witness the breathtaking beauty of nature's artwork as hexagonal basalt columns stand tall at Giants Causeway. Basalt Bomb: Experience the explosive power of a volcanic eruption, leaving behind fascinating basalt bomb formations that defy gravity. Volcanic Eruption: Behold the raw force of Mother Nature as molten lava erupts from a volcano, shaping our landscapes with its extrusive might. Microscope Image: Dive into the microscopic world with a mesmerizing microscope image revealing intricate details of the Pasamonte eucrite, an extrusive rock formation. Basalt Columns in Mexico: Explore the ancient Real del Monte mine in Mexico, where towering basalt columns tell tales of geological history and human endeavor. Isle of Ulva's Coastal Beauty: Discover nature's artistry on Scotland's Isle of Ulva, where basalt column formations and rocks create stunning coastal scenery. Irazu Volcano National Park: Ascend to new heights at Irazu Volcano National Park, gazing upon its main crater enveloped by rising clouds - a testament to past extrusive eruptions. Moon Rock Fragments: Marvel at lunar treasures brought back from space missions - moon rock fragments that hold secrets about our celestial neighbor's extrusive origins. Quartz-Feldspar Porphyry C016 / 6206: Delve into geology with this striking specimen showcasing quartz-feldspar porphyry - evidence of ancient magma reaching Earth's surface through volcanic activity. Tenorite Mineral Crystals C016 / 4933 : Uncover rare tenorite mineral crystals formed through intense heat and pressure during extrusion processes deep within our planet’s crust.