Volcanoclastic Rocks Quiz

What is the meaning of the term 'pyroclastic'?

• Volcanic eruption

• Wind deposition

• Fire and broken

• Water erosion

Which type of rock is composed solely or primarily of volcanic materials?

• Igneous rock

• Pyroclastic rock

• Metamorphic rock

• Sedimentary rock

What is the term used for volcanic rocks that have been transported and reworked through mechanical action?

• Volcaniclastic rocks

• Igneous rocks

• Metamorphic rocks

• Sedimentary rocks

What is the classification term for pyroclastic particles ranging from 2 to 64mm in diameter?

• Lapilli

• Tephra

• Ash

• Bombs

Which type of volcanic rock consists of at least 75% bombs and large blocks of volcanic material?

• Scoria

• Agglomerate

• Tuff

• Lapilli

What is the term for a mass of molten rock larger than 64mm in diameter formed during a volcanic eruption?

• Scoria

• Volcanic bomb

• Tuff

• Lapilli

Which type of volcanic bomb is formed when the lava bomb's outside solidifies during flight?

• Ribbon bombs

• Spherical bombs

• Spindle bombs

• Bread-crust bombs

What is the size range of lapilli in volcanic eruptions?

• 64mm and above

• 2-64mm

• 0.063mm

• Less than 2mm

Which type of volcanic material is created during explosive volcanic eruptions and is less than 2mm in diameter?

• Bombs

• Volcanic ash

• Tuff

• Lapilli

What is the term for a mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris, and water?

• Scoria cone

• Lava tube

• Ash fall

• Lahar