question: What happened during the c. 488 -- 444 Ma and early Silurian period ?
answer: craton Baltica collided with the terrane Avalonia
turker_answer: During the c. 488-444 Ma and early Silurian period craton Baltica collided with the terrane Avalonia .
rule-based: During the c. 488 -- 444 Ma and early Silurian period craton Baltica collided with the terrane Avalonia .