Thema Subject Categories 1.4

Previous versions of Thema are still available 1.3 1.2.

Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.

See the search hints below.

Notation Category heading Add Mod ?
R Earth Sciences, Geography, Environment, Planning
Use all R* codes for: academic, technical, specialist and general adult titles. DO NOT USE: code ‘R’ itself, but select specific categories from section R*. Use all R* codes with: other subject categories and qualifiers where appropriate, in particular PLACE 1* Qualifiers
RB Earth sciences
Use all RB* codes for: academic, specialist and professional level works.
Prefer: WN* codes for the general reader.
See also: RGB* Physical geography and topography and its subcategories, WN* Nature and the natural world: general interest and its subcategories
RBG Geology, geomorphology and the lithosphere
See also: PHVG Geophysics, RGB Physical geography and topography
RBGB Sedimentology and pedology
See also: PNC Environmental chemistry, TNCC Soil and rock mechanics, TVBP Soil science and management
RBGD Geomorphology and geological surface processes
Class here: erosion, deposition, glaciology, fluvial and aeolian processes etc.
See also: RGB Physical geography and topography
RBGF Historical geology and palaeogeology
Class here: plate tectonics, continental drift, past supercontinents, such as Pangaea, Gondwana, Laurasia, the geological history of the Earth, etc
RBGG Petrology, petrography and mineralogy 1.2
RBGH Stratigraphy
RBGK Geochemistry
See also: PNC Environmental chemistry, PNV Chemistry of minerals, crystals and gems
RBGL Economic geology
Class here: petroleum and mining geology

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