English Grammar for the Utterly Confused - Laurie Rozakis 2003
Semicolons
Chapter 10 Punctuation
Part 4 A Writers Tools
A semicolon is a comma and period combined, like this (;). The semicolon’s structure shows you that the semicolon is a hybrid of a comma and a period. It’s a stronger stop than a comma but not as strong as a period.
1. Use a semicolon between closely related independent clauses when the coordinating conjunction has been left out.
The chef cooked far too much chicken; we eagerly devoured the excess.
2. Use a semicolon between main clauses connected by conjunctive adverbs such as however, nevertheless, moreover, for example, and consequently.
Sarah wanted to be a doctor; however, she faints at the sight of blood.
3. Use a semicolon to join independent clauses when one or both clauses contain a comma.
Glenn, who is an accomplished musician, wanted to perform at his sister’s wedding; but he quickly discovered that Marcia, the maid of honor, had other plans for the entertainment.