Knowledge Geological Comments and techniques understanding and skills See Practical Guidance a. Metamorphic rocks Identify the named Sheet 4. are the result of metamorphic rocks in increased hand specimens from temperature observation of their and/or pressure on crystal size [coarse, pre- existing rocks fine], crystal causing orientation [aligned, recrystallisation to random] and reaction form new minerals with 0.5 mol dm−3 and textures. hydrochloric acid. Metamorphic rocks Identify the Candidates should [slate, schist, characteristic features know the cause of marble, of a metamorphic contact and regional metaquartzite] aureole on diagrams metamorphism. have diagnostic and simplified textures [crystal geological maps and Candidates should be size and cross-sections. aware that some of the orientation]: stated rocks can be non-foliated texture the product of both foliated texture contact and regional [slaty cleavage metamorphism. and schistosity]. See Practical Guidance c. Metamorphic rocks Use the characteristics of Sheet 4. [schist, marble and metamorphic rocks metaquartzite] [texture, mineralogy, acid See Practical Guidance have diagnostic reaction] as seen in hand Sheet 5. mineralogy. specimens/rock exposures, diagrams and photographs, simplified geological maps and cross-sections to interpret their contrasting modes of formation [contact and regional metamorphism].
Knowledge and understanding Geological techniques and skills Comments a. Metamorphic rocks are the result of increased temperature and/or pressure on pre- existing rocks causing recrystallisation to form new minerals and textures. Identify the named metamorphic rocks in hand specimens from observation of their crystal size [coarse, fine], crystal orientation [aligned, random] and reaction with 0.5 mol dm−3 hydrochloric acid. See Practical Guidance Sheet 4. Metamorphic rocks [slate, schist, marble, metaquartzite] have diagnostic textures [crystal size and orientation]: non-foliated texture foliated texture [slaty cleavage and schistosity]. Identify the characteristic features of a metamorphic aureole on diagrams and simplified geological maps and cross-sections. Candidates should know the cause of contact and regional metamorphism. Candidates should be aware that some of the stated rocks can be the product of both contact and regional metamorphism. c. Metamorphic rocks [schist, marble and metaquartzite] have diagnostic mineralogy. Use the characteristics of metamorphic rocks [texture, mineralogy, acid reaction] as seen in hand specimens/rock exposures, diagrams and photographs, simplified geological maps and cross-sections to interpret their contrasting modes of formation [contact and regional metamorphism]. See Practical Guidance Sheet 4. See Practical Guidance Sheet 5.
Geology%20Eduqas%20GCSE%20Guidance%20for%20teaching%20Word%20version.docx