Geological techniques and equipment

Geological Techniques and Equipment

Collection and Recording Techniques

  • Field sketching: Sketches are useful for capturing an overall view of the geological landscape, highlighting key features and their spatial relationships.

  • Photography: Can be used to document specific details or larger context of the geological scenes. Always include a scale reference and a north arrow.

  • Note taking: Keep a detailed geological field notebook with comprehensive notes, including rock descriptions, measurements and sketches.

  • GPS: A handheld GPS unit helps to accurately locate and record the location of geological features.

Measurement Techniques

  • Clinometer: A handheld device used to measure the incline or decline of a slope. This is pivotal when studying the dip and strike of rock layers.

  • Compass clinometer: This special type of compass, also known as a Brunton compass, is used to measure the orientation of geological structures like folds or faults.

  • Jacob’s staff: A graduated rod used for measuring the thickness of stratified rocks in the field.

Rock and Sample Collection Techniques

  • Rock Hammer: A standard tool for any geologist, a hammer is crucial for breaking open rocks to reveal fresh surfaces and for collecting samples.

  • Hand Lens: An essential tool to magnify rock features and aid in the identification of minerals.

  • Sample Bags and Labels: For collecting and properly identifying rock or soil samples.

Laboratory Techniques

  • Microscope: Invaluable for observing features of rocks and minerals that are invisible to the naked eye.

  • Thin section analysis: Made by cutting a thin slab of rock and affixing it to a glass plate, these sections allow geologists to observe minerals in great detail under a microscope.

  • X-ray diffraction (XRD): Uses X-rays to examine crystalline material, allowing geologists to identify minerals and understand their structures.

  • Petrographic microscopes: Special types of microscopes used in geology to look at thin sections of rocks under different types of light.

  • Geochemical analysis: Techniques like mass spectrometry and atomic absorption spectroscopy are used to determine the elemental or isotopic composition of rocks.

Use of Geological Software

  • Stratigraphic software: Tools used to aid in the interpretation and visualisation of stratigraphic and spatial data.

  • Seismic interpretation software: Allows geologists to interpret and model seismic data.

  • GIS software: Essential for managing and analyzing spatial data, constructing geological maps, and visualising geological models.

Remember, understanding and mastering these techniques and equipment will significantly enhance your ability to investigate and interpret geological phenomena. Practise with each tool or method, and know which one to use depending on the geological investigation at hand.