OCR A-Level Geology (H414): complete guide to the modules, papers and fieldwork

OCR A-Level Geology (specification H414) is a two-year linear course assessed by three written papers at the end of Year 13. There is no coursework grade; practical work is reported separately as the Practical Endorsement, which requires a minimum of four days of fieldwork. This page is the index: below is a module-by-module map of the seven content areas, the exam structure, the quantitative skills, and how to study each one.

The seven OCR Geology modules

The specification splits the subject into seven teaching modules. Module 1 is a set of practical and fieldwork skills that runs through everything; modules 2 to 7 carry the examinable subject content, building from minerals and rocks, through global tectonics and geological time, to Earth materials, geohazards and the analysis of sedimentary basins.

Module 1 Development of practical skills in geology

Not taught as a separate block. It defines the planning, recording, analysing and evaluating skills assessed on paper (especially in Paper 3) and through the Practical Endorsement. Field sketching, map and cross-section work, structural measurement, specimen identification and data handling recur across every paper.

Module 2 Foundations in geology

The bedrock of the course: rock-forming minerals and silicate structures, the classification and formation of igneous, sedimentary and metamorphic rocks, the rock cycle, and an introduction to fossils and geological time (relative dating, index fossils and the time scale). Start here; everything later assumes it.

Module 3 Global tectonics

Earth structure from seismic evidence, the development of plate tectonics (continental drift, sea-floor spreading and palaeomagnetism), the processes and features of constructive, destructive and conservative margins, earthquakes and seismic waves, volcanism, and geological structures (folds, faults, joints, dip and strike, and unconformities).

Module 4 Interpreting the past

Sedimentary environments and facies (structures such as cross-bedding and graded bedding, and the fluvial, deltaic, shallow-marine, deep-marine and desert environments), sedimentary logs, and geochronology (relative dating, correlation, evolution and the fossil record, and absolute dating by radiometric methods).

Module 5 Petrology

The detailed Earth-materials module: applied sedimentology, fluids and geological processes (porosity, permeability and groundwater), igneous and metamorphic petrology, and mining geology (ore-forming processes, ore grade, reserves and extraction). Hydrocarbons and the petroleum system are developed here and in Module 7.

Module 6 Geohazards

Earthquake, volcanic and landslide hazards, the distinction between hazard, vulnerability, exposure and risk, prediction, monitoring and mitigation, and engineering geology (rock and soil properties, slope stability, site investigation, foundations and ground conditions).

Module 7 Basin analysis

Sedimentary basins and the mechanisms of subsidence and accommodation space, the main basin types (rift, passive-margin and foreland), and the basin-scale hydrocarbon system (source, maturation, migration, reservoir, trap and seal) interpreted from burial history.

Exam structure

OCR A-Level Geology is assessed by three written papers, all sat at the end of the course, plus the non-examined Practical Endorsement. A calculator is allowed in every paper.

• Paper 1 Fundamentals of geology (H414/01) assesses content from all seven modules. 2 hours 15 minutes, 110 marks, 41 percent of the A-Level. A mix of short-answer, structured, calculation and some extended-response questions.
• Paper 2 Scientific literacy in geology (H414/02) is synoptic across all seven modules. 2 hours 15 minutes, 100 marks, 37 percent. It emphasises interpreting data and scientific text, evaluating evidence, and the longest level-of-response extended answers.
• Paper 3 Practical skills in geology (H414/03) tests practical and fieldwork skills applied to geological contexts. 1 hour 30 minutes, 60 marks, 22 percent. Expect maps, cross-sections, dip and true-thickness work, specimen and photograph interpretation, and graph plotting.

At least 10 percent of marks assess maths skills, and practical and fieldwork skills are examined throughout, concentrated in Paper 3. The longest extended responses are marked with level-of-response descriptors that reward a sustained, logically linked argument, not just a list of points. To be awarded the A-Level you must enter all four components, including the Practical Endorsement.

How to study OCR Geology

Geology rewards precise factual mastery plus the ability to apply it to unfamiliar maps, logs, graphs and specimens.

1. Work from the specification statements. Each numbered point is a checklist; questions are written from them. Turn each statement into a flashcard.
2. Learn definitions exactly. Mark schemes award marks for precise wording (for example "facies", "angular unconformity", "half-life", "porosity", "cut-off grade", "accommodation space").
3. Master the maps and specimens. Dip and strike, true thickness, identifying minerals and rocks in hand specimen, and reading a sedimentary log appear repeatedly across all three papers.
4. Drill the quantitative skills. Practise true-thickness, epicentre-distance, radiometric-dating, porosity and Darcy's-law calculations until they are automatic, because they are easy marks under time pressure.
5. Practise interpretation and extended response. Papers 2 and 3 reward inferring a sequence of events from a cross-section, reconstructing an environment from data, and evaluating evidence. Drill these weekly from the start of Year 13.

Module dot points

For specification-statement-level coverage, each topic has its own focused answer page with worked exam questions and cross-links. Browse the full set at /a-level-ocr/geology/syllabus. The eight clusters are:

• Rock-forming minerals and igneous processes - silicate structures, Bowen's reaction series, igneous classification and textures, and intrusive and volcanic forms.
• Sedimentary and metamorphic processes - weathering and transport, sedimentary rock formation, metamorphism and grade, and the rock cycle.
• Global tectonics - plate tectonic theory and evidence, plate margins, earthquakes, volcanism, and geological structures.
• Geological time and the fossil record - relative dating, fossils and preservation, correlation and the time scale, evolution, and radiometric dating.
• Earth structure and geophysics - the interior from seismic evidence, sedimentary environments, and basin analysis.
• Natural resources and economic geology - ore deposits, mining geology, hydrocarbons, and groundwater.
• Geohazards - earthquake, volcanic and landslide hazards, risk and mitigation.
• Fieldwork and geological skills - mapping and cross-sections, dip, strike and true thickness, and engineering geology.

For the official specification

OCR publishes the full specification (H414), past papers and mark schemes at ocr.org.uk. Always revise from the current specification and OCR's own past papers, because the question style and the level-of-response mark schemes are board-specific.