This igneous rock is mafic, extrusive, and forms the oceanic crust:

Igneous rocks that cool quickly from lava on Earth's surface; they have fine, glassy, or vesicular textures:

Why do obsidian, scoria, and pumice lack crystals?

What caused the igneous rocks scoria and pumice to have a vesicular texture (lots of holes)?

Obsidian cools the fastest of all igneous rocks, describe its texture.

Which of the following is an organic sedimentary rock formed by plants? (hint: it is a fossil fuel)

Which of the following is a chemical sedimentary rock formed as sea water evaporates?

A sedimentary rocks that is made up of fragments or pieces of other rocks is called:

A sedimentary rocks that is made from the remains of living things is called:

A sedimentary rocks that is made by evaporation & precipitation of dissolved minerals from water is called:

The compacting and cementing of sediments to form sedimentary rock is called (turning into a rock)

When rock fragments are pressed together and water is squeezed out from between them, it is called:

Horizontal layers of sediments have been lithified into rock is called:

Rock fragments, which range in size from boulders to cobbles to pebbles to microscopic clay grains, are called

Bituminous coal, an organic sedimentary rock that formed from plant matter millions of years ago is found in which Virginia Province?

This sedimentary rock contains pebbles and has a coarse texture:

What kind of sediment was compacted to form this shale; it has a fine texture?

Shale, Sandstone, and Conglomerate are examples of which type of sedimentary rock?

This sedimentary rock is classified as organic when it forms from marine organisms, but it can also be classified as chemical when it is formed by minerals precipitating from dripping water in caves:

Which is NOT a reason fossils are most likely to be found in sedimentary rocks?

This special sedimentary rock feature has crystals on the inside of some limestone rocks:

This sedimentary rock is formed from shells and sand compacted and cemented together:

Which rocks are made by heat and pressure?

Diorite is an intrusive igneous rock. What does this tell you about it?

Which type of rock can ONLY form from pre-existing protoliths (parent rocks)?

Limestone contains the mineral calcite which dissolves in acid.

Limestone is the parent rock of Marble.

Will Marble also dissolve with acid?

What happens to the minerals in a rock when it becomes a metamorphic rock?

When Magma is forced up into existing layers of rocks beneath the surface:

Metamorphic rocks are often formed at convergent boundaries where 2 continents smash together and form:

Where are almost all Metamorphic rocks formed:

Collision and subduction zones are where Earth's tectonic plates are pushed together. These areas cause:

Igneous intrusions force magma into rocks underground. The touching hot magma causes:

Which is NOT associated with metamorphic rocks?

Classification of Gneiss?

Classification of Marble?

What happens when foliation occurs?

Which is a higher quality of coal that will produce more heat energy?

Igneous rocks are classified as:

A metamorphic rock changes into an igneous rock by what two processes?

Wind, water, and ice breaking down rock is called:

These rocks often have fossils, layers, and are not as hard as other types.

Obsidian, pumice, and basalt all cooled quickly and are all examples of:

Which of the following rocks is metamorphic?

Hint: Look for signs of Foliation

Sedimentary rock formed from piles of loose debris

Sedimentary rock forms from minerals dissolved in water that precipitate out of a solution.

Textured formed from trapped gases and air bubbles