Note:  1) The igneous intrusion K is older / younger (circle one) than sedimentary layers A and B based on the principle of_____ and the principle of _____. Physical Geology by Steven Earle is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted. A sill is concordant with existing layering, and a dyke is discordant. Describe the plate tectonic settings where you would expect to find granitic/rhyolitic rocks: It is also possible for a dyke to feed a volcano. The diagram below is a cross-section through part of the crust showing a variety of intrusive igneous rocks. Magma is molten rock that flows beneath the earth's surface. Gravity influences the placement of igneous rocks because it acts on the density differences between the magma and the surrounding wall rocks (country or local rocks). Refer back too Figure 1. bottom part of the figure (figure 4.14) shown describes the process of MAGMA MIXING, a Because different types of igneous features form under varying conditions, each offers tantalizing clues to the conditions under which it solidified. Creative Commons Attribution 4.0 International License. The resulting fragments, illustrated in Figure 3.19, are known as xenoliths (Greek for “strange rocks”). If in doubt, do a print preview ), Back Geology 300 Homework and Diagrams page, Back 15. 8. Radioactive dating indicates the the granite intrusion is 170 million years old and the vesicular basalt is 260 million years old. Intrusive Igneous Rocks: When the rising magmas during a volcanic activity do not reach the earth’s surface rather they are cooled and solidfied below the surface of the earth, the resultant igneous rocks are called intrusive igneous rocks. change from one compositional type to another, for example, a magma becoming Except for the granite (a), all of these rocks are mafic in composition. In this igneous rock worksheet, students answer 5 questions about igneous rocks and then use a website to find the 6 textures of igneous rock. Start studying Intrusive and Extrusive Venn Diagram. An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within … Except for the granite (a), all of these rocks are mafic in composition. following diagram shows Bowen's Reaction Series and the The point where the lines for Q and P meet is your rock. A large dyke can be seen in Figure 3.21. (The Base your answer to the question on the geologic cross section. Assimilation is a type of MAGMATIC DIFFERENTIATION. remains intact in the form of XENOLITHS. Indicate whether each of the plutons labelled a to e on the diagram below is a dyke, a sill, a stock, or a batholith. 17 Plastic Cases with one set of Igneous Rocks, 1 set of minerals and 1 piece of pegmatite. Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions, such as batholiths, dikes, sills, laccoliths, and volcanic necks. In the diagram above, the dike and the volcanic neck—despite the latter's name—are both intrusive features, whereas the fissure, lava flows, and volcanic cone are all extrusive. form of MAGMATIC DIFFERENTIATION), Figure A dyke can be horizontal and a sill can be vertical (if the bedding is vertical). 3. On the other hand, extrusive rocks are formed when molten magma spill over to the surface as a result of volcanic eruption . The Finally, a pipe is a cylindrical body (with a circular, ellipitical, or even irregular cross-section) that served as a conduit for the movement of magma from one location to another. process of ASSIMILATION by a magma is shown in the following figure. MAGMATIC DIFFERENTIATION involves a As discussed already, plutons can interact with the rocks into which they are intruded, sometimes leading to partial melting of the country rock or to stoping and formation of xenoliths. to The ), Figure A depicts CRYSTAL SETTLING (a form of FRACTIONAL CRYSTALLIZATION. 11. The The diagram above most likely represents a _____ extrusive igneous rock intrusive igneous rock clastic sedimentary rock chemical sedimentary rock. following diagram depicts intrusive and extrusive environments and their crystal The distinction between the two is made on the basis of the area that is exposed at the surface: if the body has an exposed surface area greater than 100 km2, then it’s a batholith; smaller than 100 km2 and it’s a stock. These adjustments may include Large irregular-shaped plutons are called either stocks or batholiths. The other is extrusion, such as a volcanic eruption or similar event. ), (another pages may be more suitable for printing. 2.The shale layer was deposited. Shale Surface of Earth Igneous intr usion Igneous intr Y usion X Rock Profile Limestone Mudstone Which sequence lists the correct order of events in the area represented in the diagram? If rock layer A is of Devonian Age, rock layer E could be of 1) Triassic Age 3) Cambrian Age 2.1 Electrons, Protons, Neutrons, and Atoms, 4.5 Monitoring Volcanoes and Predicting Eruptions, 5.3 The Products of Weathering and Erosion, Chapter 6 Sediments and Sedimentary Rocks, 6.3 Depositional Environments and Sedimentary Basins, Chapter 7 Metamorphism and Metamorphic Rocks, 7.5 Contact Metamorphism and Hydrothermal Processes, 9.1 Understanding Earth through Seismology, 10.1 Alfred Wegener — the Father of Plate Tectonics, 10.2 Global Geological Models of the Early 20th Century, 10.3 Geological Renaissance of the Mid-20th Century, 10.4 Plates, Plate Motions, and Plate-Boundary Processes, 11.5 Forecasting Earthquakes and Minimizing Damage and Casualties, 15.1 Factors That Control Slope Stability, 15.3 Preventing, Delaying, Monitoring, and Mitigating Mass Wasting, Chapter 21 Geological History of Western Canada, 21.2 Western Canada during the Precambrian, Chapter 22 The Origin of Earth and the Solar System, 22.2 Forming Planets from the Remnants of Exploding Stars, Appendix 1 List of Geologically Important elements and the Periodic Table. In most cases, a body of hot magma is less dense than the rock surrounding it, so it has a tendency to move very slowly up toward the surface. Start studying Igneous Rocks. A dike is a sheet of igneous rock that cuts across rock layers vertically or at a steep angle. The diagram here is a cross-section through part of the crust showing a variety of intrusive igneous rocks. following diagram shows the mineral compositions of the different rock types and following figures depict different forms of Fractional Crystallization. Hint: use the half-life from the chart and parent isotope ratio % on the graph from question 6. Intermediate rocks (or andesitic) are those igneous rocks that contain between 52 and 63% silica. _____ is an igneous intrusion that cuts across rock layers. Geology 300 page, Back B) To which geologic era can you assign this intrusion? came in contact with the Parent/Country rock, thus causing the deformation. diagram below depicts the different rock types. Geological block diagram of a hypothetical area showing an igneous intrusion (C), a fault (H),and sedimentary rocks. ), (The A pluton reaches Earth’s surface only after uplift, weathering, or both take place. 202 page. One of the largest batholiths in the world is the Coast Range Plutonic Complex, which extends all the way from the Vancouver region to southeastern Alaska (Figure 3.21). 1) layered intrusions and igneous cumulates (two sessions); 2) felsic rocks and the residua system; and 3) carbonatites and potassic and ultrapotassic igneous rocks. Some upward-moving magma reaches the surface, resulting in volcanic eruptions, but most cools within the crust. Note that the sill-versus-dyke designation is not determined simply by the orientation of the feature. A laccolith is a sill-like body that has expanded upward by deforming the overlying rock. Draw a line on the ternary diagram below to mark the value of Q, zero at the bottom and 100 at the top. Sill, also called sheet, flat intrusion of igneous rock that forms between preexisting layers of rock.Sills occur in parallel to the bedding of the other rocks that enclose them, and, though they may have vertical to horizontal orientations, nearly horizontal sills are the most common. The diagram represents a cut-away view of Earth’s interior and the paths of some of the seismic waves produced by an earthquake that originated below Earth’s surface. Intrusive Igneous Rocks 2. image is formatted to be less than 7.5 by 9 inches. An intrusion is a body of igneous (created under intense heat) rock that has crystallized from molten magma. This rock cycle diagram will show an upper level view of … College page, Back upon your printer, you may have to adjust your page and/or printer settings to Where some of the country rock is broken off, it may fall into the magma, a process called stoping. Rocks are categorized into types based on the way in which they form. The coarse grained equivalent of a basalt is a: rhyolite gabbro andesite basalt. A 1.Igneous intrusion Y formed. textures are produced by rapid cooling associated with Extrusive