Pumice is more related to a textural feature, rather than a compositional attribute. Frothy textured igneous rocks have large numbers of tiny holes formed by the presence of many gas bubbles in the original volcanic lava. " /> (b.addEventListener("DOMContentLoaded",h,!1),a.addEventListener("load",h,!1)):(a.attachEvent("onload",h),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),g=c.source||{},g.concatemoji?f(g.concatemoji):g.wpemoji&&g.twemoji&&(f(g.twemoji),f(g.wpemoji)))}(window,document,window._wpemojiSettings); Felsic rocks are usually light in color and have specific gravities less than 3. Erupted 1970. Name a sedimentary rock that has fossils in it and what would happen to those fossils if they were exposed to the same conditions that igneous rocks are exposed to. • Site by, Hunt's Garlic And Herb Spaghetti Sauce Recipe. Who is the longest reigning WWE Champion of all time? Pumice is composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. General classification as to whether a rock is felsic or mafic is with regards to the silicate content of the rock as follows: This said, felsic pumice (white or light tan brown colors) are more common to find than mafic pumice. School Cerritos College; Course Title GEOLOGY MISC; Uploaded By MinisterKnowledge14388. For example, pumice originates when there are enough dissolved gases in the magma, such that when it is ejected from the volcano, the depressurization of the dissolved gases causes a rapid expansion as the gases exsolve (just like when you open a pop - the gases are initially under pressure, and you release that pressure by opening the can or bottle). Copyright © 2021 Multiply Media, LLC. When used to describe the characteristics of lava, mafic lava would mean that it is runnier or more viscous as opposed to the felsic lava. These two factors are what give pumice its distinctive texture and ability to float when placed in water, as opposed to other volcanic rocks (such as scoria). Ultramafic means "containing only ferro-magnesium minerals". Gabbro is the name given to intrusive mafic rocks, whereas basalt is the name given to extrusive mafic rocks. This ne-grained, dark-colored, igneous rock is most likely A. rhyolite B. diorite C. basalt D. gabbro page 2 Felsic and Ma c Igneous rocks. Pumice generally comes from felsic lavas, which are high in feldspar and silicon. While the former is created in high-temperature lava that leads to extremely low viscosity, the latter has a high viscosity. Homes For Sale In Utah Under 100 000, Scoria and Pumice. Obsidian Texture: Glassy Minerals Present: Biotite Mica Color Index: Mafic Extrusive: Pumice Texture: Vesicular Minerals Present: Plagioclase Feldspar Color Index: Felsic Extrusive: Scoria Texture: Vesicular Minerals Present: Biotite Mica Color Index: Mafic Extrusive They may contain around 10% dark-colored silicate minerals like biotite and hornblende (black). Pumice can be rhyolitic, dacitic, phonolitic, etc. Is pumice felsic or mafic? In conclusion, you have seen the most significant points in mafic vs felsic. Who was the lady with the trophy in roll bounce movie? Mafic is used for silicate minerals, magmas, and rocks which are relatively high in the heavier elements. The classification is done based on their silica content, as silica is usually the most abundant of all the oxides present. border: none !important; Felsic magma or lava is higher in viscosity than mafic magma/lava. TY - JOUR. Common felsic minerals include quartz, muscovite, orthoclase, and the sodium-rich plagioclase feldspars (albite-rich). Glassy texture and felsic composition. AU - Suzuki, Yuki. extrusive. box-shadow: none !important; It is recognized by its glassy texture. Close examination of fresh pumice shows its glassy nature. While pumice occurs in a variety of colors, it is an extremely vesicular basaltic with! Tennessee Archaeology Guidelines, Homes For Sale In Utah Under 100 000, Composition Most Common Minerals Rock Name; felsic: glass (may contain a few minerals typical of felsic rocks) pumice: mafic: glass (may contain a few mineral typical of mafic rocks) padding: 0 !important; Pumice is a froth of felsic volcanic glass. (352) 333-9898, HIPAA Notice of Privacy Practices – Contact us with HIPAA Questions, Copyright 2018 Yvette Godet, D.M.D. img.emoji { if(e.responsiveLevels&&(jQuery.each(e.responsiveLevels,function(e,f){f>i&&(t=r=f,l=e),i>f&&f>r&&(r=f,n=e)}),t>r&&(l=n)),f=e.gridheight[l]||e.gridheight[0]||e.gridheight,s=e.gridwidth[l]||e.gridwidth[0]||e.gridwidth,h=i/s,h=h>1?1:h,f=Math.round(h*f),"fullscreen"==e.sliderLayout){var u=(e.c.width(),jQuery(window).height());if(void 0!=e.fullScreenOffsetContainer){var c=e.fullScreenOffsetContainer.split(",");if (c) jQuery.each(c,function(e,i){u=jQuery(i).length>0?u-jQuery(i).outerHeight(!0):u}),e.fullScreenOffset.split("%").length>1&&void 0!=e.fullScreenOffset&&e.fullScreenOffset.length>0?u-=jQuery(window).height()*parseInt(e.fullScreenOffset,0)/100:void 0!=e.fullScreenOffset&&e.fullScreenOffset.length>0&&(u-=parseInt(e.fullScreenOffset,0))}f=u}else void 0!=e.minHeight&&f