Having studied English from an early age, I've been always taught that English has a fixed sentence structure and words within it appear in a fixed order.
For example, one is supposed to say: A pen is on the table. Or: There is a pen on the table. According to this principle (the subject coming before the predicate), one shouldn't say: On the table is a pen.
However, reading some English books and articles, I've noticed a violation of this rule. I've seen it in sentences like these:
- In the east is the Atlantic coast.
- In the far north is the famous Arctic region.
- In the mountain region are big deposits of coal.
What is the justification of these structures? Are they correct?