Consider the apparatus shown in the following drawing. (a) When the valve between the two containers is opened and the gases allowed to mix, how does the volume occupied by the N2 gas change? What is the partial pressure of N2 after mixing? (b) How does the volume of the O2 gas change when the gases mix? What is the partial pressure of O2 in the mixture? (c) What is the total pressure in the container after the gases mix?
GEOL102 Chapter 5 Notes FACTORS AFFECTING SEDIMENTARY CHARACTERISTICS Time Tectonic setting Physical, chemical, & biological processes in depositional environment The way the sediment was transported – e.g. wind, water, etc. Other rocks found in the source area where the sediment came from Climate (and its effect on weathering) Chemical weathering – e.g. in rainforests Physical weathering – e.g. in deserts Post-depositional processes of lithification (cementation, compaction) TECTONICS/STRUCTURAL BEHAVIOR Tectonics – the forces controlling deformation or structural behavior of a large area of the Earth’s crust over a long period of time The Midwestern U.S. is tectonically stable New Orleans & Mexico City are sinking/subsiding New England & parts of Canada after the glacial retreat have been rising gently Parts of Oregon and the Cascade Mountains are rising actively, causing mountain and plateau formations The grain size and thickness of the sediment are affected by tectonics PRINCIPLE TECTONIC ELEMENTS OF A CONTINENT Craton – the stable interior of a continent, which has remained unchanged by mountain formations since the Precambrian Eon Shield – large area of exposed crystalline rock Platforms – ancient crystalline rocks underneath layers of sedimentary rocks Orogenic belts – mountainous belts surrounding the craton, which have been deformed by compression since Precambrian Eon DEPOSITION