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Sima often takes the form of basalt when on the surface. In geology, sima (/ ˈ s aɪ m ə /) is an antiquated [1] blended term for the lower layer of Earth's crust. This layer is made of rocks rich in magnesium silicate minerals. Typically, when the sima comes to the surface, it is basalt, so sometimes this layer is called the 'ocean layer' of ...
Because of the large pressures, over geologic time, the sima flows like a very viscous liquid, so, in a real sense, the sial floats on the sima, in isostatic equilibrium. [9] Mountains extend down as well as up, much like icebergs on the ocean; [9] so that on the continental plates, the sial runs between 5 km and 70 km deep. [10]
The thickness of Earth's crust (km). The continental crust consists of various layers, with a bulk composition that is intermediate (SiO 2 wt% = 60.6). [5] The average density of the continental crust is about, 2.83 g/cm 3 (0.102 lb/cu in), [6] less dense than the ultramafic material that makes up the mantle, which has a density of around 3.3 g/cm 3 (0.12 lb/cu in).
Sial – Rocks rich in aluminium silicate minerals; Sima – Rocks rich in magnesium silicate minerals; Hydrosphere – Total amount of water on a planet; Lithosphere – Outermost shell of a terrestrial-type planet or natural satellite; Ocean – Body of salt water covering most of Earth; Plate tectonics – Movement of Earth's lithosphere
Therefore, the seismologists of that time considered that the Conrad discontinuity should correspond to a sharply defined contact between the chemically distinct two layers, sial and sima. [2] Despite the fact that sial and sima are two solid layers, the lighter sial is thought to "float" on top of the denser sima layer.
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Dia has special objects to help draw entity-relationship models, Unified Modeling Language (UML) diagrams, flowcharts, network diagrams, and simple electrical circuits. It is also possible to add support for new shapes by writing simple XML files, using a subset of Scalable Vector Graphics (SVG) to draw the shape.
Examples of such use are the Ekofisk concrete tank of the Ekofisk oil field, the Condeep concrete gravity base structures and the Kvitebjørn jacket in the North Sea. In the late 1970s development of a completely new version of Sesam started. [5] This version was released in the mid-1980s under the name SESAM'80 and is the basis for today's Sesam.