# geology

/dʒiˈɑɫədʒi/ (US) · /dʒɪˈɒlədʒi/ (UK)

Source: https://englishreference.com/word/geology
Updated: 2026-06-20

## Senses

### 1. the scientific study

noun · CEFR B2

the science that studies the Earth's history, its rocks, and how it was formed.

For teachers: the scientific discipline concerned with the physical structure and substance of the Earth, its history, and the processes that act on it.

- She decided to study geology because she was fascinated by how mountains are formed.
- Modern geology relies heavily on plate tectonics to explain the distribution of fossils and the formation of mountain ranges across different continents.

Usage: Uncountable when referring to the academic field of study.

### 2. rock structure of an area

noun · CEFR C1 · Technical

the specific types of rocks and soil found in a particular place.

For teachers: the geological features or rock formations of a specific region or area.

- The geology of this island is mostly volcanic rock and black sand.
- The local geology consists primarily of limestone, which has led to the formation of extensive cave systems throughout the valley.

Usage: Can be used as a countable noun when comparing different regions.

## Examples

- She decided to study geology to learn about volcanoes.
- The local geology consists mostly of limestone, which explains why there are so many caves in the area.
- Understanding the regional geology is essential for engineers before they begin constructing heavy infrastructure like dams or skyscrapers to ensure the ground can support the weight.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.