What is a microcontinent?

Microcontinents and continental fragments are distinct pieces of continental crust that have broken away from main continental masses. In geological terms, major continents correspond to seven large areas of continental crust, while smaller fragments like Madagascar are classified separately as microcontinents. Historically, these fragments can drift across oceans and eventually collide with other continental masses.

What we know

• Continental fragments and microcontinents are pieces of continents that break off from main continental masses to form distinct islands. [2]
• Geological continents are defined as seven large areas of continental crust, which explicitly exclude smaller fragments such as Madagascar that are termed microcontinents. [5]
• Avalonia developed as a volcanic arc before rifting off to become a drifting microcontinent that later collided with Baltica and Laurentia. [3]

Where to go next

• how it workedHow do continents drift apart over time?
• a case in pointWhat is the geological history of Avalonia?
• the bigger pictureHow are major continents defined in geology?
• what followedWhat happens when microcontinents collide with main landmasses?
• compared withHow does Madagascar compare as a microcontinent versus major landmasses?
• an unexpected connectionHow does a piece of an ancient North American and European microcontinent end up in modern Newfoundland and England?The ancient microcontinent Avalonia rifted apart during the breakup of Pangea, leaving its scattered remains distributed across both modern eastern North America and Northwestern Europe.

Sources

• [1]continental fragment (Wikidata Q2094611) · CC0 1.0
• [2]Continental fragment · CC BY-SA 4.0
• [3]Avalonia · CC BY-SA 4.0
• [4]Europe · CC BY-SA 4.0
• [5]Continent · CC BY-SA 4.0