Knowledge and Geological techniques Comments understanding and skills SP8: Production of full rock description of macro and micro features from hand specimens and/or unfamiliar field exposures of igneous rocks in order to interpret component composition, colour and textures, to identify rock type and to deduce their cooling history. Identification in hand specimen Candidates need only of the following igneous rocks have knowledge of the from their composition, texture igneous rocks indicated. and other diagnostic features: Silicic: granite Candidates should be able to identify the stated Mafic: gabbro, dolerite, igneous rocks in hand basalt specimen and the field. It is Ultramafic: peridotite. understood that it might not SP9: Use of photomicrographs be possible to investigate to identify minerals and rock the full range of rocks in the textures of igneous rocks to field or that this list is identify rock type and to deduce exclusive. their cooling history. Use of ratios, fractions and percentages. For exemplification of Calculation of the mathematical skills see circumferences, surface areas Mathematical Guidance and volumes of regular shapes. for A level Geology. Construction and interpretation The mathematical skills of frequency tables and identified are not exclusive diagrams, bar charts and to this section of the histograms. specification. Knowledge of the characteristics of normal and skewed distributions.
Knowledge and understanding Geological techniques and skills Comments SP8: Production of full rock description of macro and micro features from hand specimens and/or unfamiliar field exposures of igneous rocks in order to interpret component composition, colour and textures, to identify rock type and to deduce their cooling history. Identification in hand specimen of the following igneous rocks from their composition, texture and other diagnostic features: Silicic: granite Mafic: gabbro, dolerite, basalt Ultramafic: peridotite. SP9: Use of photomicrographs to identify minerals and rock textures of igneous rocks to identify rock type and to deduce their cooling history. Use of ratios, fractions and percentages. Calculation of the circumferences, surface areas and volumes of regular shapes. Construction and interpretation of frequency tables and diagrams, bar charts and histograms. Knowledge of the characteristics of normal and skewed distributions. Candidates need only have knowledge of the igneous rocks indicated. Candidates should be able to identify the stated igneous rocks in hand specimen and the field. It is understood that it might not be possible to investigate the full range of rocks in the field or that this list is exclusive. For exemplification of mathematical skills see Mathematical Guidance for A level Geology. The mathematical skills identified are not exclusive to this section of the specification.
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