Meaning: a smaller earthquake that follows a larger one

Part of speech: noun

Example: The aftershock caused further damage to the buildings.

Category: Geology › Earthquakes

Synonyms:

• tremor
• afterquake

Meaning: a type of mineral or gemstone, often banded

Part of speech: noun

Example: She wore an agate pendant.

Category: Geology › Minerals

Synonyms:

• gemstone
• mineral

Meaning: A geological formation that can store and transmit water.

Part of speech: noun

Example: The aquifer supplies water to the nearby town.

Category: Geology

Synonyms:

• water-bearing layer
• water source

Meaning: the solid rock underlying loose material

Part of speech: noun

Example: The construction site reached bedrock after digging.

Category: Geology

Synonyms:

• foundation
• base

Meaning: Referring to igneous rock that has solidified on the earth's surface.

Part of speech: adjective

Example: Extrusive rocks are formed from lava that cools quickly.

Category: Geology

Synonyms:

• surface
• volcanic

Meaning: A mistake or error.

Part of speech: noun

Example: It was my fault that we were late.

Synonyms:

• error
• defect

Antonyms:

• perfection
• flawlessness

Meaning: A geological fault that can cause earthquakes.

Part of speech: noun

Example: The city is located near a major fault line.

Category: Geology › Earth Science

Synonyms:

• fracture
• crack

Meaning: A narrow opening or crack in a surface.

Part of speech: noun

Example: There was a fissure in the rock.

Category: Geology

Meaning: A hard type of rock used to create sparks.

Part of speech: noun

Example: He struck the flint to start a fire.

Category: Geology

Synonyms:

• stone
• rock

Meaning: an opening in the Earth's crust that emits steam and gases

Part of speech: noun

Example: The fumarole released sulfurous gases.

Category: Geology

Synonyms:

• vent
• gas vent

Meaning: A type of sedimentary rock composed mainly of calcium carbonate.

Part of speech: noun

Example: Limestone is often used in construction.

Category: Geology › Rocks

Synonyms:

• rock
• stone

Meaning: a geological term for a large sheet of rock

Part of speech: noun

Example: The nappe was formed millions of years ago.

Category: Geology

Meaning: A large excavation in the ground for mining or other purposes.

Part of speech: noun

Example: The open pit mine was visible from miles away.

Category: Geology

Synonyms:

• quarry
• excavation

Meaning: A visible exposure of rock or soil on the surface.

Part of speech: noun

Example: The outcrop of granite was impressive.

Category: Geology

Synonyms:

• exposure
• exposed rock

Meaning: Soil that contains valuable minerals or resources.

Part of speech: noun

Example: They struck paydirt while digging for gold.

Category: Geology

Synonyms:

• rich soil
• valuable ground

Meaning: The area at the surface of a mine.

Part of speech: noun

Example: The workers gathered at the pithead after their shift.

Category: Geology › Mining

Synonyms: mine entrance

Meaning: a place where stone or minerals are extracted

Part of speech: noun

Example: The workers operated in the quarry all day.

Category: Geology › Mining

Synonyms: mine

Meaning: a hard mineral composed of silicon and oxygen

Part of speech: noun

Example: Quartz is commonly used in jewelry.

Category: Geology › Minerals

Meaning: A type of rock made from sand particles.

Part of speech: noun

Example: The building was made of sandstone.

Category: Geology

Synonyms: rock

Meaning: Referring to gemstones that are not classified as precious but still valuable.

Part of speech: adjective

Example: Amethyst is a semi-precious stone.

Category: Geology › Gemology

Synonyms:

• semi-valuable
• lesser gem

Meaning: A type of sedimentary rock that can easily split into layers.

Part of speech: noun

Example: The cliff was made of shale, giving it a unique appearance.

Category: Geology › Rocks

Synonyms: sedimentary rock

Meaning: A type of rock used for roofing or writing.

Part of speech: noun

Example: The roof was made of slate.

Category: Geology › Rocks

Synonyms:

• shale
• stone

Meaning: Resembling slate; having a dark grey color.

Part of speech: adjective

Example: The slaty rocks were used for the pathway.

Category: Geology › Rocks

Synonyms:

• slate-like
• greyish

Meaning: Layers of rock or soil.

Part of speech: noun

Example: The strata revealed the history of the Earth.

Category: Geology

Synonyms:

• layers
• levels

Antonyms:

• whole
• single layer

Meaning: A valuable mineral or gem found within rock layers.

Part of speech: noun

Example: The strata gem was discovered during the excavation.

Category: Geology › Mineralogy

Synonyms:

• gemstone
• mineral

Meaning: A layer or level, especially in geology or sociology.

Part of speech: noun

Example: Each stratum of rock tells a different story.

Category: Geology

Synonyms:

• layer
• level

Antonyms:

• whole
• single layer

Meaning: A series of stripes or lines, often in geological contexts.

Part of speech: noun

Example: The striation on the rock indicated its age.

Category: Geology

Synonyms:

• stripe
• line

Meaning: The gradual caving in or sinking of an area of land.

Part of speech: noun

Example: Subsidence can cause serious structural damage.

Category: Geology

Synonyms:

• sinking
• settlement

Meaning: The layer of soil beneath the topsoil.

Part of speech: noun

Example: The subsoil is important for plant growth.

Category: Geology

Synonyms:

• underlayer
• soil layer

Meaning: An underlying layer or substance.

Part of speech: noun

Example: The substratum of the soil affects its fertility.

Category: Geology

Synonyms:

• foundation
• base

Meaning: Existing, occurring, or done under the earth's surface.

Part of speech: adjective

Example: The subterranean tunnels were used for transportation.

Category: Geology

Synonyms:

• underground
• subsurface

Meaning: A trough or fold of stratified rock in which the strata slope upward from the axis.

Part of speech: noun

Example: The geologist studied the syncline to understand the area's geological history.

Category: Geology

Meaning: A sudden upward movement or force.

Part of speech: noun

Example: The up thrust of the earth created a new mountain.

Category: Geology

Synonyms:

• surge
• lift