... climate=paleoclimate TYPES OF SEDIMENTARY ROCKS Clastic rocks • • • • Chemical & Organic rocks Sandstones Conglomerates Breccia Shale/mudstones Evaporitic rocks These rocks are formed due to evaporation ... and formation of sedimentary rocks by mode of river water- deposition on the continent and on the ocean floor Fluvial deposits Marine deposits SEDIMENTARY ROCKS: are th...
... following slides are all sedimentary rocks From the information displayed Decide if the rock is: clastic, organic or chemical Identify each rock accurately as possible Suggest a sedimentary environment ... environment in which it may have formed as Identify this Sedimentary Rock 1cm Poorly Sorted 40% Muddy Matrix Rock Fragments Mineral Grains Identify this Sedimentary Rock Reacts wi...
... with magma Types of Metamorphic Rocks Schist rocks are metamorphic These rocks can be formed from basalt, an igneous rock; shale, a sedimentary rock; or slate, a metamorphic rock Through tremendous ... can become a sedimentary rock Sedimentary rocks – are arranged in thick horizontal layers called bedding Types of Sedimentary Rocks Sandstone rocks are sedim...
... Classification of Sedimentary Rocks Sedimentary rocks usually originate in water environments, either oceans, lakes, or river beds Sedimentary rocks are grouped as; 1) Clastic 2) Chemical ... common and make up the majority of sedimentary rocks found on Earth’s surface Reference: Pages 159 - 173 ◆Three Classes of Sedimentary Rocks: 1.) Detrital sedimentary r...
... (flood event?) Sedimentary environments Concept of Sedimentary “Facies” “Facies” are representations of sedimentary environments defined by the overall association of features preserved in rocks ... dunes at top of picture Sedimentary Structures Note ripplemarked sand dunes at top of picture Sedimentary structures: Mud Cracks Say you find mud cracks in an ancient sedimentary roc...
... us about the nature of the source rocks Loose Sediments gravel sand silt clay Sedimentary rocks conglomerate sandstone siltstone shale Detrital Sedimentary Rocks ❖ Other important textural features: ... Detrital Sedimentary Rocks Breccia ❖ Course like a conglomerate, but with angular grains ❖ Short transport! ❖Deposited close to the source area for sediment ◆ Detrital sedimen...
... of older rocks in a conglomerate Sedimentary Rocks and the Rock Cycle Volcanic rocks (basalt flows on Hawaii) being turned into sediments Basalt flows Basalt gravels Older sedimentary rocks Younger ... (transport) processes • Soils •Types of sedimentary rocks: Chemical Origin of Sedimentary Rocks - Derived through the weathering and erosion of pre-existing rocks - Form by...
... Metamorphic rocks When rocks are baked by heat of molten magma or squeezed by the movements of huge tectonic plates or by the pressure of overlying thick succession of rocks They ... to separate from micaceous layers Varieties: Orthogneiss: rocks formed from Igneous rocks paragneiss: rocks formed from Sedimentary rocks -metasedimentary gneisses QUARTIZITE -it comprise...
... absolute age dating • determination of amounts of radioactive parent and stable daughter Relative Age dating SED-MET ROCKS -AGE • Age determination method • relative and absolute age determination ... ROCKS -AGE • Age determination (geologic age) • important concepts used • relative age concepts • crosscutting and intrusive nature of igneous rocks • law of superpo...
... for the classification of arenites If the proportion of matrix is less than 15% plot the data and use Dott’s diagram for the classification of arenites This classification is based on the major ... distances, increasing the maturity of the sands (e.g., Colorado River, Rio Grande, Mississippi River) II Genetic Classification of sedmentary rocks Classificat...
... record • They hold all of the oil, gas,coal, and water — locating these materials requires an understanding of the physical characteristics of different sedimentary rocks and how those characteristics ... 3-D Coconino Sandstone Coconino Sandstone up close thin slice of Coconino sandstone seen through microscope un-cemented quartz sand grains from a sand dune So how are sedim...
... transportation Sedimentary rocks are typically layered, (although layering is not diagnostic of only sedimentary rocks) Lecture Outline Sedimentary rocks; surface processes Your sedimentary environment ... carbonate rocks ("carbonates") and evaporitic rocks ("evaporites") Lecture Outline Sedimentary rocks Your sedimentary environment and Burial and diagenesis Interpretat...
... converting loose sediment into sedimentary rock – Combination of compaction and cementation Types of Sedimentary Rocks • Detrital (clastic) sedimentary rocks – Most common sedimentary rock type – Form ... pre-existing rocks • Chemical sedimentary rocks – Have crystalline textures – Form by precipitation of minerals from solution • Organic sedimentary rocks – Accumulate f...