PPT-Sedimentary Cores and ice cores tell us about earth's past.

Rock and Ice Core Samples But what do they tell us about Earths past Warm Up September 30 2015 Describe the Law of Superposition What is an unconformity How do scientists determine the absolute age of a rock or fossil. Change . . Fig. 2, p. 312. Chapter Objectives. Weather, climate & climate basics . Climate change through geologic time. Ice ages. Present day climate change. Table 9.1. I. Weather & Climate. By Tom Repine. West Virginia Geological and Economic Survey. One way to begin this activity is with the following narration: “This is a cartoon of an outcrop of 300-million year old rocks found in West Virginia. The little “smiley faces” are fossils (brachiopods in this case), the dots are sand grains of various sizes, the brick pattern is limestone, a partial brick pattern indicates the rock is only partly limestone, the thick horizontal solid black line is coal, and the little vertical squiggles sticking out below the coal are plant roots. (Does this help you figure out which way is up?) Dashed lines of different sizes represent lack of artistic talent—they should all be the same length? Don’t forget to note the differences in the way the various rocks touch each other (contacts). Some are well defined, others are less well defined, while some are actually not even perfectly horizontal. The number of fossils is not the same everywhere. The size of the sand particles shows a fairly consistent change vertically. Not all of the rock layers are continuous. To a geologist, these little clues provide insight into what happened long ago.. Sedimentary-sandstone. Metamorphic- gneiss. Igneous- diorite. 1. What is a Rock?. Naturally Occurring . (not man made). Solid. Mixture of minerals other organic matter. 2. What makes a rock different from a mineral?. What is the difference between clastic and non-clastic sedimentary rocks? . What we know. The process of formation for a sedimentary rock involves the following steps:. Weathering. Erosion. Deposition. What You Will Learn. Describe the origin of sedimentary rock. . Describe the three main categories of sedimentary rock. . Describe three types of sedimentary structures. . Where does Sand come from?. Sedimentary rocks form in 1 of 3 ways:. 1. . Clastic. Sedimentary Rocks- made of pieces and grains of other rocks. Material such as . sand . or . mud. -usually deposited in . water. Conglomerate sandstone. Favs. .. . Where do sediments come from?. - Weathering. – breaking down rock into smaller pieces chemically and physically.. - Erosion. - carrying away the particles and depositing them. . Glaciers. Laura Marschke. Southwest Early College. Overview. What are we learning about today?. What is an isotope?. What are isotopes used for?. “Behind the scenes” of ice cores. The science of ice cores and isotopes. Americans Turn to Ice Cream Once Again After years of declining sales, ice cream made a comeback during the 52 weeks ending August 6, 2017, increasing 3.9% to $6.1 billion. The North American ice cream market is expected to have a CAGR of 4.1% from 2018 through 2023. Ice Hockey What is Ice Hockey Ice Hockey is a game played In the Olympics and for a weekend sport. Ice hockey is a very competitive because it is an Olympic sport so more people play ice hockey more often. Sedimentary structures. Sedimentary structures.  are those structures formed during sediment deposition. .. Sedimentary structures such as . cross bedding, graded bedding, mud . cracks, . Strata. . Chemical Sedimentary Rocks. In contrast to detrital rocks, which form from the solid products of weathering, . chemical sediments . derive from ions that are carried in solution to lakes and seas. . Sediment . Texture. Sediment texture refers to the shape, size and three-dimensional arrangement of the particles . that make . up sediment or a sedimentary rock.. Textures can be . clastic or . crystalline. SEDIMENTARY GEOLOGY. MEET PETER. Professor Peter Clift . is a . sedimentary geologist . at . Louisiana State University . in the USA.. He is investigating how the. Asian monsoon . has influenced the .