• Question: What rock can float on water?
  Answer: Pumice.
• Question: I am formed from the remains of tiny marine organisms. What am I?
  Answer: Chalk.
• Question: I’m often used to carve sculptures and buildings. What rock am I?
  Answer: Marble.
• Question: I am a gemstone formed from volcanic activity. What am I?
  Answer: Opal.
• Question: I’m a type of sedimentary rock made from compressed plant remains. What am I?
  Answer: Coal.
• Question: I am known for my layers and often used in construction. What rock am I?
  Answer: Slate.
• Question: I am a fossilized tree resin. What am I?
  Answer: Amber.
• Question: I’m formed from the rapid cooling of magma underground. What rock am I?
  Answer: Granite.
• Question: I am a soft, fine-grained sedimentary rock often used in carvings. What am I?
  Answer: Soapstone.
• Question: I am the hardest natural substance on Earth. What am I?
  Answer: Diamond.
• Question: I am a type of rock that forms when limestone is subjected to heat and pressure. What am I?
  Answer: Marble.
• Question: I am a sedimentary rock formed from clay minerals. What am I?
  Answer: Shale.
• Question: I’m a volcanic glass with a smooth, shiny appearance. What am I?
  Answer: Obsidian.
• Question: I am formed from the remains of ancient marine organisms. What rock am I?
  Answer: Limestone.
• Question: I am a type of rock that forms from the cooling of lava at the Earth’s surface. What am I?
  Answer: Basalt.
• Question: I am a type of rock that forms from the cooling of magma beneath the Earth’s surface. What am I?
  Answer: Diorite.
• Question: I am a type of sedimentary rock made of tightly packed grains. What am I?
  Answer: Sandstone.
• Question: I am a naturally occurring solid aggregate of one or more minerals. What am I?
  Answer: Rock.
• Question: I am a type of rock that forms from the cooling of lava ejected from a volcano. What am I?
  Answer: Tuff.
• Question: I am a type of sedimentary rock made of carbonate minerals. What am I?
  Answer: Dolomite.

• Question: I am formed from the cooling and solidification of molten rock. What am I?
  Answer: Igneous rock.
• Question: I am a type of sedimentary rock made of calcium carbonate. What am I?
  Answer: Chalk.
• Question: I am a type of rock that forms from the alteration of pre-existing rock through heat and pressure. What am I?
  Answer: Metamorphic rock.
• Question: I am a type of rock that forms from the accumulation and cementation of mineral grains. What am I?
  Answer: Sedimentary rock.
• Question: I am a type of igneous rock with large crystals embedded in a fine-grained matrix. What am I?
  Answer: Porphyry.
• Question: I am a type of sedimentary rock made of compressed plant material. What am I?
  Answer: Peat.
• Question: I am a type of rock composed primarily of quartz. What am I?
  Answer: Quartzite.
• Question: I am a type of igneous rock that forms from the cooling and solidification of lava above the Earth’s surface. What am I?
  Answer: Extrusive igneous rock.
• Question: I am a type of sedimentary rock formed from the accumulation of organic debris in a swampy environment. What am I?
  Answer: Bog iron.
• Question: I am a type of rock composed of volcanic glass fragments. What am I?
  Answer: Tuff breccia.
• Question: I am a type of metamorphic rock that forms from the alteration of limestone. What am I?
  Answer: Marble.
• Question: I am a type of igneous rock with a vesicular texture. What am I?
  Answer: Scoria.
• Question: I am a type of sedimentary rock made from the accumulation of organic remains such as shells and coral. What am I?
  Answer: Coquina.
• Question: I am a type of rock formed from the alteration of pre-existing rock by the intrusion of magma. What am I?
  Answer: Contact metamorphic rock.
• Question: I am a type of metamorphic rock with distinct layers or banding. What am I?
  Answer: Gneiss.
• Question: I am a type of sedimentary rock made of angular fragments of other rocks. What am I?
  Answer: Conglomerate.
• Question: I am a type of rock formed from the accumulation of organic material in a marine environment. What am I?
  Answer: Chert.
• Question: I am a type of igneous rock formed from the cooling and solidification of magma beneath the Earth’s surface. What am I?
  Answer: Intrusive igneous rock.
• Question: I am a type of sedimentary rock made of microscopic shells of marine organisms. What am I?
  Answer: Diatomite.
• Question: I am a type of metamorphic rock that forms from the alteration of shale. What am I?
  Answer: Slate.

Another Geology riddles

• Question: I am a type of rock formed from the cementation of volcanic ash. What am I?
  Answer: Tuff.
• Question: I am a type of sedimentary rock formed from the accumulation of organic matter in stagnant water. What am I?
  Answer: Oil shale.
• Question: I am a type of rock formed from the recrystallization of limestone. What am I?
  Answer: Marble.
• Question: I am a type of igneous rock formed from the cooling and solidification of lava flows. What am I?
  Answer: Basalt.
• Question: I am a type of sedimentary rock made of compressed plant matter. What am I?
  Answer: Coal.
• Question: I am a type of metamorphic rock formed from the alteration of sandstone. What am I?
  Answer: Quartzite.
• Question: I am a type of rock formed from the compaction and cementation of mineral grains. What am I?
  Answer: Sedimentary rock.
• Question: I am a type of igneous rock formed from the cooling of magma deep underground. What am I?
  Answer: Granite.
• Question: I am a type of sedimentary rock made of calcite or aragonite. What am I?
  Answer: Limestone.
• Question: I am a type of rock formed from the solidification of molten rock material. What am I?
  Answer: Igneous rock.
• Question: I am a type of metamorphic rock formed from the alteration of shale. What am I?
  Answer: Slate.
• Question: I am a type of rock formed from the alteration of pre-existing rock by heat and pressure. What am I?
  Answer: Metamorphic rock.
• Question: I am a type of igneous rock with a glassy texture. What am I?
  Answer: Obsidian.
• Question: I am a type of sedimentary rock formed from the accumulation of organic matter in marine environments. What am I?
  Answer: Chalk.
• Question: I am a type of rock formed from the consolidation of volcanic ash and dust. What am I?
  Answer: Tuff.
• Question: I am a type of metamorphic rock formed from the alteration of limestone. What am I?
  Answer: Marble.
• Question: I am a type of igneous rock formed from the cooling and solidification of magma within the Earth’s crust. What am I?
  Answer: Intrusive igneous rock.
• Question: I am a type of sedimentary rock formed from the accumulation of sand-sized grains. What am I?
  Answer: Sandstone.
• Question: I am a type of rock formed from the accumulation and compaction of organic matter in wet environments. What am I?
  Answer: Peat.
• Question: I am a type of metamorphic rock with a foliated texture. What am I?
  Answer: Schist.

• Question: I am a type of sedimentary rock formed from the remains of microscopic organisms. What am I?
  Answer: Diatomite.
• Question: I am a type of rock formed from the cooling of molten magma on the Earth’s surface. What am I?
  Answer: Extrusive igneous rock.
• Question: I am a type of metamorphic rock formed from the alteration of limestone or dolostone. What am I?
  Answer: Marble.
• Question: I am a type of igneous rock formed from the rapid cooling of lava. What am I?
  Answer: Basalt.
• Question: I am a type of sedimentary rock made of fossilized plant material. What am I?
  Answer: Coal.
• Question: I am a type of metamorphic rock formed from the alteration of sandstone. What am I?
  Answer: Quartzite.
• Question: I am a type of rock formed from the accumulation of organic matter in stagnant water. What am I?
  Answer: Oil shale.
• Question: I am a type of igneous rock formed from the cooling of magma deep underground. What am I?
  Answer: Granite.
• Question: I am a type of sedimentary rock made of calcite or aragonite. What am I?
  Answer: Limestone.
• Question: I am a type of rock formed from the solidification of molten rock material. What am I?
  Answer: Igneous rock.
• Question: I am a type of metamorphic rock formed from the alteration of shale. What am I?
  Answer: Slate.
• Question: I am a type of rock formed from the alteration of pre-existing rock by heat and pressure. What am I?
  Answer: Metamorphic rock.
• Question: I am a type of igneous rock with a glassy texture. What am I?
  Answer: Obsidian.
• Question: I am a type of sedimentary rock formed from the accumulation of organic matter in marine environments. What am I?
  Answer: Chalk.
• Question: I am a type of rock formed from the consolidation of volcanic ash and dust. What am I?
  Answer: Tuff.
• Question: I am a type of metamorphic rock formed from the alteration of limestone. What am I?
  Answer: Marble.
• Question: I am a type of igneous rock formed from the cooling and solidification of magma within the Earth’s crust. What am I?
  Answer: Intrusive igneous rock.
• Question: I am a type of sedimentary rock formed from the accumulation of sand-sized grains. What am I?
  Answer: Sandstone.
• Question: I am a type of rock formed from the accumulation and compaction of organic matter in wet environments. What am I?
  Answer: Peat.
• Question: I am a type of metamorphic rock with a foliated texture. What am I?
  Answer: Schist.

Getting over with Geology riddles

• What starts as molten rock beneath Earth’s crust, then cools to form igneous rock?
• What sedimentary rock is formed from the accumulation of organic material over millions of years?
• What mineral, often found in caves, forms delicate, translucent crystals?
• What geological feature forms when a layer of rock is tilted and eroded, creating a steep slope on one side?
• What is the name for the process by which rocks are broken down into smaller particles by wind, water, or ice?
• What type of rock is formed from the cooling and solidification of magma or lava?
• What geological feature is formed when an underground water table drops, causing the land above to sink?
• What sedimentary rock is composed primarily of compressed plant remains?
• What mineral, often used in jewelry, is a form of crystalline carbon?
• What geological process occurs when one tectonic plate slides beneath another?
• What type of rock is formed from the accumulation and compression of organic material over time?
• What mineral, commonly used in construction, is a major component of limestone?
• What geological feature is formed when a layer of rock is forced upward by tectonic forces?
• What sedimentary rock is formed from the accumulation of shell fragments?
• What mineral, known for its hardness, is composed of silicon dioxide?
• What geological process occurs when rocks are changed by heat and pressure, but not melted?
• What type of rock is formed from the alteration of existing rocks through heat and pressure?
• What mineral, often found in granite, is composed of quartz, feldspar, and mica?
• What geological feature is formed when a glacier scrapes and shapes the land beneath it?
• What sedimentary rock is made up of compressed clay, silt, and organic material?