3/27/2023 0 Comments Mylitta fluctus![]() ![]() Similar constructs can be found at significantly larger diameters spanning over an order of magnitude in diameter, unlike other features such as steep-sided domes. These 21 volcanoes formed in regions of middling crustal thicknesses and generally formed away from tessera terrains they are over neither major mantle downwellings nor upwellings (with the possible exception of fissure-derived constructs). Statistically, these constructs have slopes significantly lower than those of terrestrial and Martian volcanoes of similar diameter, as has been noted for large Venusian volcanoes, though some of the steepest constructs in this work have slopes similar to the shallowest terrestrial and Martian volcanoes portions of the flanks of Ne Ngam Mons and an edifice that formed in the caldera of Toci Tholus exceed 9° and 20°, respectively. We grouped the volcanoes into five general categories based on morphology and slope: stellate fracture centers, shield-like, fissure-derived, concave-sided, and volcano/corona hybrids. Volcanoes in this size range have received little previous attention because they are not adequately sampled by Magellan altimetry, but we have been able to discern their basic shapes with stereo-derived topography from multiple-look radar imagery. We have examined the morphology and morphometry of 21 mid-sized Venusian volcanoes (flow apron diameter 50–300 km) in the area covered by Magellan stereo imaging, excluding the already well-studied steep-sided domes. The high altitude distribution and heights, however, emphasize the necessity of considering other factors, such as tectonic setting, edifice age, magma supply, and thermal gradient, in describing the location and development of large volcanoes on Venus. The observed distributions at low-mid altitudes is consistent with the predictions of NBZ theory. In addition, it is observed that the volcanoes at the highest altitudes tend to be the tallest. Although large volcanoes are relatively uniformly distributed in altitude, there may be a slight paucity of volcanoes at the lowest elevations and a slight surplus at midaltitudes. The distribution and height of these large volcanoes as a function of altitude was examined to begin to test these predictions. On the basis of theory it has been predicted that the development of neutral buoyancy zones (NBZ) on Venus and thus the resulting volcanic deposits are strongly influenced by the altitude-controlled variations in surface pressure. Recent Examples on the Web The tax on your gains can fluctuate with your tax bracket.īob Carlson, Forbes, 26 Aug.Magellan data reveal 156 large volcanoes on Venus (> 100 km in diameter) which range in height from 300 m to 5.55 km, with an average height of 1.42 km. 2022 This number can fluctuate depending on number of days per week worked, number of patients seen, types of cases completed (medical versus cosmetic versus surgical), practice location, and more. Monique Brouillette, Popular Mechanics, 12 Aug.Ģ022 Others, like blood cortisol levels, may fluctuate between different set points based on stress levels or sleep cycles. 2022 Since indoor radon levels are tied to airflow, levels can fluctuate day to day and by season. The background for our unit definition and characterization is described in Tanaka. 2022 But day to day, the speed of Earth's spin can fluctuate. 1995), Mylitta Fluctus to the south (Magee Roberts and others, 1992). ![]() ![]() Man, those assholes really pulled a fluctus by Stein15 OctoGet the fluctus mug.Ģ022 Anonymous: The level of risk does fluctuate from one demographic group to the next, yes, infuriatingly so - another moral outrage for which Americans are on the hook.Ĭarolyn Hax, Washington Post, 23 July 2022 This construction technique reduces the expansion and contraction that occurs with solid wood due to changing environmental conditions such as humidity levels, which fluctuate throughout the year, says Shapiro.Īrricca Elin Sansone, House Beautiful, 26 July 2022 See More Getting to big for your brigdes and heading of in your own direction without thinking trough the concequences. fluctuate - WordReference English dictionary, questions, discussion and forums. The KelvinHelmholtz instability is a fluid instability that occurs when there is velocity. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fluctuate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Etymology: 17th Century: from Latin flucture, from fluctus a wave. ![]()
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