What is the difference between intrusive and extrusive volcanic rock?

Extrusive volcanic rocks, like those derived from 'volcanic rock' clues, form when magma solidifies on the Earth's surface (e.g., lava flows). Intrusive rocks form when magma cools and solidifies beneath the surface. Extrusive rocks typically have finer grains due to rapid cooling.

Why are 'volcanic rock' clues common in crosswords?

These clues are popular because there are many different types of volcanic rocks with varying letter counts (e.g., LAVA, TUFF, BASALT, PUMICE, OBSIDIAN), making them versatile for puzzle constructors. They also relate to a well-known geological concept.

How can knowing rock types help me solve crosswords?

Familiarity with geological terms, including various rock types, can provide an edge. Crossword setters often use scientific or nature-related clues. Knowing a few common examples for different lengths can save time when facing such clues.

crossword clue volcanic rock – All Crossword Answers

Welcome to Crosswordanswer.co.uk! If you're stuck on the clue "volcanic rock" in your crossword puzzle, you've come to the right place. We provide a comprehensive list of possible answers, sorted by letter count, along with helpful explanations to get you back on track.

Solutions for "crossword clue volcanic rock" by Letter Count

4 Letters

LAVA: Molten rock (magma) that has been expelled from the interior of a terrestrial planet (or moon) onto its surface, where it solidifies.

TUFF: A type of rock made of volcanic ash ejected from a vent during a volcanic eruption.

6 Letters

BASALT: A common extrusive igneous (volcanic) rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a planet or moon.

PUMICE: A lightweight, vesicular (full of holes) volcanic rock formed when gas-rich frothy lava rapidly cools.

SCORIA: A dark, rough, vesicular volcanic rock fragment that is typically mafic and denser than pumice.

8 Letters

OBSIDIAN: A naturally occurring volcanic glass formed as an extrusive igneous rock, typically black and often used in tools due to its sharp edges.

ANDESITE: An extrusive igneous rock of intermediate composition, commonly found in volcanic mountain ranges above subduction zones.

More About "volcanic rock"

Volcanic rocks are a fascinating category of igneous rocks formed from molten lava erupting from volcanoes and cooling rapidly on the Earth's surface. This rapid cooling prevents large crystal formation, resulting in fine-grained or glassy textures. Their variety in composition, color, and texture makes them excellent subjects for crossword clues, as they can range from the common and simple 'LAVA' to more specific geological terms like 'BASALT' or 'OBSIDIAN'.

Understanding the different types of volcanic rocks can not only help you with crosswords but also provide insight into geological processes. For instance, 'PUMICE' is notable for its lightness due to trapped gas bubbles, making it float on water, while 'BASALT' is a primary component of oceanic crust. Crossword clues often play on these distinguishing features or the rock's appearance or common uses.

Tips For Your Next Puzzle

Consider Letter Count First: Always check the number of letters required for the answer. This immediately narrows down your options, especially for clues like "volcanic rock" that have many possible solutions.
Think of Common Examples: For natural phenomena or materials, start with the most common or well-known examples first (e.g., LAVA for volcanic rock, OAK for tree).
Look for Context Clues: Sometimes, the surrounding clues or already filled-in letters can provide hints, such as a first letter or a specific common ending.
Expand Your Vocabulary: Regularly reading about diverse topics, including geology, can expand your knowledge base, making it easier to recognize less common answers.

For more advice, visit our page on general crossword strategies.

Frequently Asked Questions

What's the difference between lava and volcanic rock?

Lava is the molten rock that flows from a volcano. Once this lava cools and solidifies, it becomes volcanic rock. So, lava is the liquid state, and volcanic rock is its solid form after eruption.

Are all igneous rocks volcanic rocks?

No, not all igneous rocks are volcanic rocks. Igneous rocks are formed from the cooling and solidification of magma or lava. Volcanic rocks (or extrusive igneous rocks) form from lava cooling on the surface. Intrusive igneous rocks form from magma cooling below the surface, like granite.

How can I remember different rock types for crosswords?

Try associating them with their common characteristics or uses. For example, PUMICE is porous and light, OBSIDIAN is glassy and sharp, BASALT is dark and common in ocean floors. Flashcards or quick mental associations can be very helpful for remembering diverse terms.