RARE Giant Volcanic Bomb Mineral, Museum Piece, 8 million years old 8,5 kilos
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RARE Giant Volcanic Bomb Mineral, Museum Piece, 8 million years old 8,5 kilos :
$1595.99
Giant, Rare, Unique and Heavy Huge Volcanic BOMB Stone, 8 million years old!!! One of a kind
Great for Museum display, decoration purposes or for your collection
8,5 kilos
About 27cm x 22cm X 15cm
Comes with an ID Card
8 Million Years Old!!!
A rare volcanic bomb stone is huge and heavy(these volcanic specimens are very rare and hard to find)it\'s full of small minerals and crystals, a rare find, you can actually see them in the photos, makes a great decoration piece, excellent for collections and makes a great museum display.Those same crystals can be found in its interior as well.These volcanic BOMBS exist in all sizes and shapes, most of them have an oval shape.
Origin:
These specimens come from the Azores Islands, it\'s about 8 million years old.
The Azores are actually some of the tallest mountains on the planet, measured from their base at the bottom of the ocean to their peaks, which thrust high above the surface of the Atlantic.
Thearchipelagoof the Azores is located in the middle of the northern hemisphere of the Atlantic Ocean and extends along a west-northwest to east-southeast orientation (between 36.5°–40° Northlatitudesand 24.5°–31.5° Westlongitudes) in an area approximately 600 kilometres (373 miles) wide. The islands of the Azores emerged from what is called the Azores Platform, a 5.8 million km2region that is morphologically accented by a depth of 2000 meters.[18][19]
From a geostructural perspective the Azores is located above an activetriple junctionbetween three of the world\'s large tectonic plates (theNorth American Plate, theEurasian Plateand theAfrican Plate),[19]a condition that has translated into the existence of many faults and fractures in this region of the Atlantic.[20]The westernmost islands of the archipelago (CorvoandFlores) are located in the North American Plate, while the remaining islands are located within the boundary that divides the Eurasian and African Plates.
The principal tectonic structures that exist in the region of the Azores are theMid-Atlantic Ridge, theTerceira Rift, the Azores Fracture Zone and theGlória Fault.[19]TheMid-Atlantic Ridgeis the main frontier between the American Plate and the African-Eurasian Plates that crosses the Azores Platform between the islands ofFloresandFaialfrom north to south then to the southwest; it is an extensive form crossed by many transform faults running perpendicular to its north-south orientation, that is seismically active and susceptible to volcanism. The Terceira Rift is a system of fractures that extends from the Mid-Atlantic Ridge to the Glória Fault that represents the main frontier between the Eurasian and African Plates. It is defined by a line of submarine volcanoes and island mounts that extend northwest to southeast for about 550 kilometres (342 miles), from the area west ofGraciosauntil the islets of theFormigas, that includes the islands of Graciosa, Terceira and São Miguel. Its northwest limit connects to the Mid-Atlantic Ridge, while the southeast section intersects the Gloria Fault southeast of the island ofSanta Maria. The Azores Fracture Zone is that extends from the Glória Fault and encompasses a relatively inactive area to the south of the islands of the Central and Eastern groups north to the Terceira Rift, along a 45° angle. The Glória Fault, for its part, extends 800 kilometres (497 miles) along a linear line from the Azores to theAzores–Gibraltar Transform Fault.[21]
The island\'s volcanism is associated with the rifting along theAzores Triple Junction; the spread of the crust along the existing faults and fractures has produced many of the active volcanic and seismic events,[22]while supported by buoyant upwelling in the deeper mantle, some associate with anAzores hotspot.[23]Most of the volcanic activity has centered, primarily, along theTerceira Rift. From the beginning of the island\'s settlement, around the 15th century, there have been 28 registered volcanic eruptions (15 terrestrial and 13 submarine). The last significant volcanic eruption, theCapelinhosvolcano (Vulcão dos Capelinhos), occurred off the coast of the island of Faial in 1957; the most recent volcanic activity occurred in the seamounts and submarine volcanoes off the coast ofSerretaand in the Pico-São Jorge Channel.[24]The islands have many examples of volcano-built geomorphology including many of the caves and subterranean lava tubes (such as theGruta das Torres,Algar do Carvão,Gruta do Natal, Gruta das Cinco Ribeiras), the coastal lava fields (like the coast ofFeteiras,Faial, the Mistério ofPrainhaor São João onPico Island) in addition to the currently inactive cones in centralSão Miguel Island, the aforementioned Capelinhos on Faial, the volcanic complexes ofTerceiraorPliniancaldeira ofCorvo Island.
The islands of the archipelago were formed through volcanic and seismic activity during theNeogenePeriod; the first embryonic surfaces started to appear in the waters of Santa Maria during theMiocene epoch(from circa 8 million years ago). The sequence of the island formation has been generally characterized as: Santa Maria (8.12 Ma), São Miguel (4.1 Ma), Terceira (3.52 Ma), Graciosa (2.5 Ma), Flores (2.16 Ma), Faial (0.7 Ma), São Jorge (0.55 Ma), Corvo (0.7 Ma) and the youngest, Pico (0.27 Ma).[25]Although all islands have experienced volcanism during their geological history, within recorded \"human settlement\" history the islands of Santa Maria, Flores, Corvo and Graciosa have not experienced any volcanic eruptions; in addition to active fumaroles and hot-springs, the remaining islands have had sporadic eruptions since the 14th century. Apart from theCapelinhosvolcano in 1957–58, the last recorded instance of \"island formation\" occurred off the coast of São Miguel, when the island ofSabrinawas briefly formed.
Owing to its geodynamic Environment, the region has been center of intense seismic activity, particularly along its tectonic boundaries on the Mid-Atlantic Ridge and Terceira Rift. Seismic events although frequent, usually tectonic or vulco-tectonic in nature, but in general low to medium intensities, occasionally punctuated by events of level 5 or greater on theRichter scale.[26][27]The most severe earthquake was registered in 1757, nearCalhetaon the island ofSão Jorge, which exceeded 7 on theRichter scale. In comparison, the 1522 earthquake, mentioned byGaspar Frutuosothe historian, was only a magnitude 6.8, but a level 10 on theMercalli scale,[28]but responsible for the destruction ofVila Franca do Campoand landslides that may have killed less than 5000 of the inhabitants.
Source:wikipedia.org
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RARE Giant Volcanic Bomb Mineral, Museum Piece, 8 million years old 8,5 kilos :
$1595.99