geology AWS
GCE AS
WJEC Eduqas GCE AS in
GEOLOGY P5 Production of full rock description of macro and micro features from hand specimens and unfamiliar field exposures of sedimentary rocks in order to interpret component composition, colour and textures, to identify rock types and to deduce their environment of deposition
Title: P5 Production of full rock description of macro and micro features from hand specimens and unfamiliar field exposures of sedimentary rocks in order to interpret component composition, colour and textures, to identify rock types and to deduce their environment of deposition Specification reference: 2.1e Aim: To produce a full rock description of macro and micro features from hand specimens and unfamiliar field exposures of sedimentary rocks in order to interpret component composition, colour and textures, to identify rock types and to deduce their environment of deposition. Apparatus: Hand lens or light microscope Ruler A sediment comparator A range of sedimentary rocks Method: 1. Select a hand specimen of a sedimentary rock (or an unfamiliar field exposure of sedimentary rock). 2. Describe the texture of the rock: • clastic/fragmental/granular • grain size (s) • grain shape • the degree of sorting of the grains. 3. Describe features of the composition of the rock: • colour(s) • identify the minerals within the rock • identify the composition of the cement. 4. Observe and record any macro features in the sedimentary rock specimen such as sedimentary structures or fossil content. Analysis: 1. Identify the name of the rock using the textural characteristics and compositional information recorded. 2. Refer to appropriate sources of information e.g. AS notes and internet sources, to determine the environment of formation of the rock using the evidence gathered. Teacher/Technician notes: Specimens should be selected to cover the list of sedimentary rocks, features and environments stated in section 2.1d, e and f of the specification. Sediments may be a useful resource (e.g. a range of sands from beach, river, glacial and desert environments). N.B. A sediment comparator is a useful tool in describing sedimentary rock texture. However it is not permitted equipment in the examinations and learners should be made aware of this.
WJEC Eduqas GCE AS in
GEOLOGY P5 Production of full rock description of macro and micro features from hand specimens and unfamiliar field exposures of sedimentary rocks in order to interpret component composition, colour and textures, to identify rock types and to deduce their environment of deposition
Title: P5 Production of full rock description of macro and micro features from hand specimens and unfamiliar field exposures of sedimentary rocks in order to interpret component composition, colour and textures, to identify rock types and to deduce their environment of deposition Specification reference: 2.1e Aim: To produce a full rock description of macro and micro features from hand specimens and unfamiliar field exposures of sedimentary rocks in order to interpret component composition, colour and textures, to identify rock types and to deduce their environment of deposition. Apparatus: Hand lens or light microscope Ruler A sediment comparator A range of sedimentary rocks Method: 1. Select a hand specimen of a sedimentary rock (or an unfamiliar field exposure of sedimentary rock). 2. Describe the texture of the rock: • clastic/fragmental/granular • grain size (s) • grain shape • the degree of sorting of the grains. 3. Describe features of the composition of the rock: • colour(s) • identify the minerals within the rock • identify the composition of the cement. 4. Observe and record any macro features in the sedimentary rock specimen such as sedimentary structures or fossil content. Analysis: 1. Identify the name of the rock using the textural characteristics and compositional information recorded. 2. Refer to appropriate sources of information e.g. AS notes and internet sources, to determine the environment of formation of the rock using the evidence gathered. Teacher/Technician notes: Specimens should be selected to cover the list of sedimentary rocks, features and environments stated in section 2.1d, e and f of the specification. Sediments may be a useful resource (e.g. a range of sands from beach, river, glacial and desert environments). N.B. A sediment comparator is a useful tool in describing sedimentary rock texture. However it is not permitted equipment in the examinations and learners should be made aware of this.
