Context: The British Isles lie at the juncture of several regions with past episodes of tectonic mountain building. These orogenic belts form a complex geology that records a huge and varied span of Earth's history. Of particular note was the Caledonian Orogeny during the Ordovician Period, c. 488–444 Ma and early Silurian period, when the craton Baltica collided with the terrane Avalonia to form the mountains and hills in northern Britain and Ireland. Baltica formed roughly the northwestern half of Ireland and Scotland. Further collisions caused the Variscan orogeny in the Devonian and Carboniferous periods, forming the hills of Munster, southwest England, and southern Wales. Over the last 500 million years the land that forms the islands has drifted northwest from around 30°S, crossing the equator around 370 million years ago to reach its present northern latitude.

Question: When did the Caledonian Orogeny occur?
Answer: c. 488–444 Ma and early Silurian period

Question: What happened during the c. 488–444 Ma and early Silurian period?
Answer: craton Baltica collided with the terrane Avalonia

Question: What formed after the craton Baltica and the terrane Avalonia collision?
Answer: mountains and hills

Question: What formed the hills of Munster and the southern part of Wales?
Answer: Variscan orogeny

Question: In which direction have the British Isles been drifting?
Answer: northwest

Question: What orogeny occurred in the 4th century?
Answer: Unanswerable

Question: What collided in the 4th century?
Answer: Unanswerable

Question: What formed before the craton Baltica and Avalonia collision?
Answer: Unanswerable

Question: What has been drifting north east for the last 500 million years?
Answer: Unanswerable

Question: The hills in northern England and Ireland were formed when what collided with Avalonia?
Answer: Unanswerable

Question: What formed the southwestern half of Ireland and Scotland?
Answer: Unanswerable

Question: Avalonia formed the northwestern half of Ireland and what other country?
Answer: Unanswerable

Question: During what time span was the Orogenic Period?
Answer: Unanswerable

Question: What did Baltica collide with to form the equator?
Answer: Unanswerable