geological

geological — adjective

1. relating to the way the Earth's rocks and soil were formed and how they change o

1.adjectiveB2
Definition

relating to the way the Earth's rocks and soil were formed and how they change over time.

Example

A geological survey of the valley found large copper deposits deep underground.

collocation: geological survey

The canyon's red rock walls reveal millions of years of geological change.

collocation: geological change

Common collocations
  • geological survey
  • geological map
  • geological history
  • geological formation
  • geological time
  • geological features
  • geological structure
Synonyms
  • geologic

    Variant form used more often in American English; interchangeable in most contexts (e.g., 'geologic time' vs. 'geological time').

  • earth-science

    Broader term covering geology, oceanography, and meteorology; less technical and more general.

Grammar Patterns

geological + noun

Usage Note

Almost always used before a noun (attributive position). Common collocations include 'geological survey,' 'geological map,' 'geological history,' and 'geological time.' Not typically used after a linking verb (e.g., 'This rock is geological' sounds incomplete — use 'This rock has geological significance' instead).

Common Mistakes

The geological features of Taiwan include its rivers and lakes.
The geographical features of Taiwan include its rivers and lakes.
'geological' refers to rocks and Earth structure; 'geographical' refers to the physical features of an area including water bodies.

Word family

Synonym discussion

Sense: adjective/1

'Geological' and 'geologic' are nearly interchangeable, though 'geologic' is more common in American scientific writing (e.g., 'geologic time scale') while 'geological' appears more in British and general usage. 'Geophysical' is narrower, focusing on Earth's physical properties such as magnetic fields and seismic waves — a geophysical survey measures signals, whereas a geological survey maps rock types. 'Earth-science' is the broadest term, covering geology, oceanography, meteorology, and astronomy. For most learners, 'geological' is the safest choice when describing the Earth's rock structure and history. For example: 'The geological history of the region' sounds natural, while 'the geophysical history' would be unusual unless you are specifically discussing measured data.

geological ↗geologicgeophysical ↗earth-science

Common collocations

Nouns

Adverbs

Etymology

GreekLatinEnglish

Comes from modern Latin 'geologia' (a term first used around 1735), which was formed from the Greek words 'gē' (earth) and '-logia' (study of). The word originally referred to the study of the Earth's solid materials and physical structure.