From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #4668 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Friday, July 31 2020 Volume 14 : Number 4668 Today's Subjects: ----------------- 20/20 without glasses ["20/20 without glasses" <20/20withoutglasses@visio] Stop worrying about getting stuck in your bathtub ["Walk-in Bathtub Finde] LED Road Flares Emergency Lights 3 Pack, Roadside Warning Flashlight Car Safety Flare. ["Roadside Flares Disc" Subject: 20/20 without glasses 20/20 without glasses http://visionprotocol.buzz/6e1AcTlcVHqZzsy2vajsfhs3x3DULcQParVbpC-KthpjkO1o http://visionprotocol.buzz/2380XYLw52TU5dShdZAXlijPc51OFcLH17LCvHvSg4cjM70 An important method for imaging large-scale structures in Earth's interior is seismic tomography, by which the area under consideration is "illuminated" from all sides with seismic waves from earthquakes from as many different directions as possible; these waves are recorded with a network of seismometers. The size of the network is crucial for the extent of the region which can be imaged reliably. For the investigation of the Iceland Plume, both global and regional tomography have been used; in the former, the whole mantle is imaged at relatively low resolution using data from stations all over the world, whereas in the latter, a denser network only on Iceland images the mantle down to 400b450 km depth with higher resolution. Regional studies from the 1990s and 2000s show that there is a low seismic-wave-speed anomaly beneath Iceland, but opinion is divided as to whether it continues deeper than the mantle transition zone at roughly 600 km depth. The velocities of seismic waves are reduced by up to 3% (P waves) and more than 4% (S waves), respectively. These values are consistent with a small percentage of partial melt, a high magnesium content of the mantle, or elevated temperature. It is not possible to unambiguously separate out which effect causes the observed velocity reduction. Geochemistry Numerous studies have addressed the geochemical signature of the lavas present on Iceland and in the north Atlantic. The resulting picture is consistent in several important respects. For instance, it is not contested that the source of the volcanism in the mantle is chemically and petrologically heterogeneous: it contains not only peridotite, the principal mantle rock type, but also eclogite, a rock type that originates from the basalt in subducted slabs and is more easily fusible than peridotite. The origin of the latter is assumed to be metamorphosed, very old oceanic crust which sank into the mantle several hundreds of millions of years ago during the subduction of an ocean, then upwelled from deep within the mantle. Studies using the major and trace-element compositions of Icelandic volcanics showed that the source of present-day volcanism was about 100 B0C greater than that of the source of mid-ocean ridge basalts. The variations in the concentrations of trace elements such as helium, lead, strontium, neodymium, and others show clearly that Iceland is compositionally distinct from the rest of the north Atlantic. For instance, the ratio of He-3 and He-4 has a pronounced maximum on Iceland, which correlates well with geophysical anomalies, and the decrease of this and other geochemical signatures with increasing distance from Iceland indicate that the extent of the compositional anomaly reaches about 1,500 km along the Reykjanes Ridge and at least 300 km along the Kolbeinsey Ridge. Depending on which elements are considered and how large the area covered is, one can identify up to six different mantle components, which are not all present in any single location. ------------------------------ Date: Fri, 31 Jul 2020 06:58:33 -0400 From: "Walk-in Bathtub Finder" Subject: Stop worrying about getting stuck in your bathtub Stop worrying about getting stuck in your bathtub http://hardagain.bid/pNdaUPiKPpVuF-PmBLQaBIzFscHdZtoDlFf3s4ZHwyvRQ5e- http://hardagain.bid/a2wTHEAW9o4ek9LyRHEPBZbfB3x34pFJyuXPQ_ExN5Lln4A Abrasion occurs when the ice and its load of rock fragments slide over bedrock and function as sandpaper, smoothing and polishing the bedrock below. The pulverized rock this process produces is called rock flour and is made up of rock grains between 0.002 and 0.00625 mm in size. Abrasion leads to steeper valley walls and mountain slopes in alpine settings, which can cause avalanches and rock slides, which add even more material to the glacier. Glacial abrasion is commonly characterized by glacial striations. Glaciers produce these when they contain large boulders that carve long scratches in the bedrock. By mapping the direction of the striations, researchers can determine the direction of the glacier's movement. Similar to striations are chatter marks, lines of crescent-shape depressions in the rock underlying a glacier. They are formed by abrasion when boulders in the glacier are repeatedly caught and released as they are dragged along the bedrock. The rate of glacier erosion varies. Six factors control erosion rate: Velocity of glacial movement Thickness of the ice Shape, abundance and hardness of rock fragments contained in the ice at the bottom of the glacier Relative ease of erosion of the surface under the glacier Thermal conditions at the glacier base Permeability and water pressure at the glacier base When the bedrock has frequent fractures on the surface, glacial erosion rates tend to increase as plucking is the main erosive force on the surface; when the bedrock has wide gaps between sporadic fractures, however, abrasion tends to be the dominant erosive form and glacial erosion rates become slow. Glaciers in lower latitudes tend to be much more erosive than glaciers in higher latitudes, because they have more meltwater reaching the glacial base and facilitate sediment production and transport under the same moving speed and amount of ice. Material that becomes incorporated in a glacier is typically carried as far as the zone of ablation before being deposited. Glacial deposits are of two distinct types: Glacial till: material directly deposited from glacial ice. Till includes a mixture of undifferentiated material ranging from clay size to boulders, the usual composition of a moraine. Fluvial and outwash sediments: sediments deposited by water. These deposits are stratified by size. ------------------------------ Date: Fri, 31 Jul 2020 08:50:11 -0400 From: "Roadside Flares Disc" Subject: LED Road Flares Emergency Lights 3 Pack, Roadside Warning Flashlight Car Safety Flare. LED Road Flares Emergency Lights 3 Pack, Roadside Warning Flashlight Car Safety Flare. http://roadsidedisc.buzz/wVW2W3FVUEKA7bPb8zMx6zU9E0Vfe-mo3t0Y_J68udNfnvVE http://roadsidedisc.buzz/q_GLkCkTEUz_8KgQ2TabVnQ7OILWhUZHFWDTn5mmVcwGCPEG hough not as nutritious as other organs such as fruit, leaves provide a food source for many organisms. The leaf is a vital source of energy production for the plant, and plants have evolved protection against animals that consume leaves, such as tannins, chemicals which hinder the digestion of proteins and have an unpleasant taste. Animals that are specialized to eat leaves are known as folivores. Some species have cryptic adaptations by which they use leaves in avoiding predators. For example, the caterpillars of some leaf-roller moths will create a small home in the leaf by folding it over themselves. Some sawflies similarly roll the leaves of their food plants into tubes. Females of the Attelabidae, so-called leaf-rolling weevils, lay their eggs into leaves that they then roll up as means of protection. Other herbivores and their predators mimic the appearance of the leaf. Reptiles such as some chameleons, and insects such as some katydids, also mimic the oscillating movements of leaves in the wind, moving from side to side or back and forth while evading a possible threat. Seasonal leaf loss Leaves shifting color in autumn (fall) Leaves in temperate, boreal, and seasonally dry zones may be seasonally deciduous (falling off or dying for the inclement season). This mechanism to shed leaves is called abscission. When the leaf is shed, it leaves a leaf scar on the twig. In cold autumns, they sometimes change color, and turn yellow, bright-orange, or red, as various accessory pigments (carotenoids and xanthophylls) are revealed when the tree responds to cold and reduced sunlight by curtailing chlorophyll production. Red anthocyanin pigments are now thought to be produced in the leaf as it dies, possibly to mask the yellow hue left when the chlorophyll is lostbyellow leaves appear to attract herbivores such as aphids. Optical masking of chlorophyll by anthocyanins reduces risk of photo-oxidative damage to leaf cells as they senesce, which otherwise may lower the efficiency of nutrient retrieval from senescing autumny ------------------------------ End of alt.music.moxy-fruvous digest V14 #4668 **********************************************