Geology Terms A-Z

GIven a definition, try to name the geology term that corresponds to that letter

Source: Wikipedia

The first letter of the word has been given to help.

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Last updated: April 20, 2026

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First submitted	April 20, 2026
Times taken	5
Average score	50.0%
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Definition

Answer

Fossilized resin or tree sap, usually orange or gold

Amber

A landform scooped out by water erosion

Basin

A material whose constituents are arranged in lattice structure

Crystal

The process by which material is added to an area

Deposition

The wearing away of rocky by wind, water, and/or ice

Erosion

The preserved remains or traces of a dead organism

Fossil

A loose collection of rocks

Gravel

A fissure where geothermally heated water discharges

Hydrothermal vent

Rock formed by the solidification of cooled magma

Igneous

A geological period (201 mya to 143.1 mya). Hint: dinosaurs

Jurassic

Topography formed by the dissolution of soluble bedrock

Karst

Molten rock expelled from an erupting volcano

Lava

An inorganic solid with a specific chemical composition

Mineral

A small, irregularly rounded lump of mineral that has a contrasting composition of the enclosing sediment

Nodule

Volcanic glass formed when moleten rock cools rapidly

Obsidian

A vertical standing rock formation

Pillar

A mineral composed of silicon dioxide

Quartz

A linear zone where the lithosphere is being pulled apart

Rift

Very fine rock particles

Sediment / silt / sand

One of the divisions of the lithosphere

Tectonic plate

An igneous rock with a very low silica content

Ultramafic

A vent or mountain from wihich molten rock and gases escape to the surface

Volcano

An iron, manganese, and tungstate material

Wolframite

A rock fragment that becomes enveloped in a larger rock

Xenolith

A type of powdered, yellow uranium representing an intermediate step in processing uranium ore

Yellowcake

A zirconium silcate

Zircon

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