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Johnson Geo Centre
The Johnson Geo Centre is a geological interpretation centre located on Signal Hill in St. John's, Newfoundland and Labrador, Canada. The museum is named for philanthropist Paul Johnson and opened in 2002. Building Design Most of the centre is located underground, in an excavated glacial formation that shows the exposed bedrock of the hill. The building is designed to take advantage of the geological features of Signal Hill where most of the structure is below ground exposing natural rock formations. The area was originally a peat filled area that was stripped of overburden and a glass-encased structure of 2.5 stories was built atop the excavation. The building was built through the Johnson Family Foundation at a cost of $11 million. The building utilizes a heating and cooling system via six geothermal wells drilled to a depth of 500 feet. Museum Content Visitors travel a 3.7 billion year timeline, exploring themes such as continental drift, glaciation, earthquakes an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Museum Of Canada
The Digital Museums Canada (DMC; , ''MNC'') is a funding program in Canada "dedicated to online projects by the museum and heritage community," helping organizations to build digital capacity. Administered by the Canadian Museum of History (CMH) with the financial support of the Government of Canada, DMC provides investments of CA$15,000 to $250,000 for audience-engaging online projects by Canadian museums and heritage organizations. As of 2021, Digital Museums Canada took the place of the Virtual Museum of Canada (VMC), a national virtual museum. With a directory of over 3,000 Canadian heritage institutions and a database of over 600 virtual exhibits, VMC's site was scheduled to discontinue hosting exhibits after 30 June 2021. Virtual Museum of Canada Virtual Museum of Canada (VMC) was a national virtual museum that was replaced by Digital Museums Canada as of 2021. VMC was administered by the Canadian Museum of History (CMH), and its content was created by Canadian museums ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museums In St
A museum ( ; plural museums or, rarely, musea) is a building or institution that cares for and displays a collection of artifacts and other objects of artistic, cultural, historical, or scientific importance. Many public museums make these items available for public viewing through exhibits that may be permanent or temporary. The largest museums are located in major cities throughout the world, while thousands of local museums exist in smaller cities, towns, and rural areas. Museums have varying aims, ranging from the conservation and documentation of their collection, serving researchers and specialists, to catering to the general public. The goal of serving researchers is not only scientific, but intended to serve the general public. There are many types of museums, including art museums, natural history museums, science museums, war museums, and children's museums. According to the International Council of Museums (ICOM), there are more than 55,000 museums in 202 co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, ''tuffaceous sandstone''). Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called tufa in guidebooks and in television programmes. Volcanic ash The material that is expelled in a vol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siltstone
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.Blatt ''et al.'' 1980, pp.381-382 Although its permeability and porosity is relatively low, siltstone is sometimes a tight gas reservoir rock, an unconventional reservoir for natural gas that requires hydraulic fracturing for economic gas production. Siltstone was prized in ancient Egypt for manufacturing statuary and cosmetic palettes. The siltstone quarried at Wadi Hammamat was a hard, fine-grained siltstone that resisted flaking and was almost ideal for such uses. Description There is not complete agreement on the definition of siltstone. One definition is that siltstone is mudrock (clastic sedimentary rock containing at least 50% clay and silt) in which at least 2/3 of the clay and silt fraction is composed of silt-sized particles. Silt is define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually relate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (geology)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinised name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian is an informal unit of geologic time, subdivided into three eons ( Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga) to the beginning of the Cambrian Period, about million years ago ( Ma), when hard-shelled creatures first appeared in abundance. Overview Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Heritage Information Network
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Signal Hill, Newfoundland And Labrador
Signal Hill is a hill which overlooks the city of St. John's, Newfoundland and Labrador, Canada. Mostly a National Historic Site, adjacent to is the largely encaved museum of Johnson Geo Centre and its associated park. The highest point, Ladies' Lookout, above Cabot Tower, is high. The community of The Battery lies on the slope of the hill overlooking the Harbour. On 12 December 1901, the first transatlantic wireless transmission was received by Guglielmo Marconi, to its abandoned fever hospital. Due to its strategic placement overlooking the Narrows, the only entrance to the harbor, fortifications date back to the mid 17th century. Memorial University of Newfoundland and Labrador has a campus on the lower slopes, in the former Battery Hotel, and is also now the owner of the Johnson Geo Centre. History The final battle of the Seven Years' War in North America was fought in 1762 at the Battle of Signal Hill, in which the French surrendered St. John's to a British force u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Museums Association
The Canadian Museums Association (CMA; french: Association des musées canadiens, ''ACM''), is a national non-profit organization for the promotion of museums in Canada. It represents Canadian museum professionals both within Canada and internationally. As with most trade associations, it aims to improve the recognition, growth and stability of its constituency. Its staff supports their nearly 2,000 members with conferences, publications, and networking opportunities. CMA members include national museums, non-profit museums, art galleries, science centres, aquariums, archives, sport halls-of-fame, artist-run centres, zoos and historic sites across Canada. They range from large metropolitan galleries to small community museums. All are dedicated to preserving and presenting Canada's cultural heritage to the public. History In 1932, British Museums Association President Sir Henry Miers visited museums in Canada and found them "in a deplorable state and far behind those of the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Association Of Science-Technology Centers
The Association of Science and Technology Centers (ASTC) is a non-profit, global organization based in Washington, D.C., in the United States, that provides a collective voice, professional support, and programming opportunities for science centers, museums, and related institutions. Through strategic alliances and global partnerships, ASTC's goal is to increase awareness of the valuable contributions its members make to their communities and the field of informal STEM learning. Founded in 1973, ASTC now represents nearly 700 members in almost 50 countries, including not only science centers and museums, but also nature centers, aquariums, planetariums, zoos, botanical gardens, and natural history and children's museums, as well as companies, consultants, and other organizations that share an interest in informal science education. Purpose Science centers aims to connect people with science, give science a presence in the community and offer people of all ages and backg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saunders_Quarry-1.jpg "Click for more on -> Sandstone")
