Descriptive and narrative writing, while often taught separately, are rarely written separately. A good narrative piece has to describe enough that we can picture it in our heads, and even the best descriptive writing will not carry our attention for long unless something happens, which requires narrative writing.
The chart below spells out a few of the different characteristics of these two kinds of writing.

Descriptive
Narrative
Focus:
- Putting a picture in the reader's head - Appealing to the five senses
- Relating a series of events - Retelling a story or an event
Typical Order (organization):
Spatial
Sequential (Chronological)
Transitions:
Above, below, to the other side, etc.
Then, next, following that, etc.
Helpful literary devices:
Personification, simile, metaphor, setting
plot, characters, foreshadowing
Writing focus:
Vivid verbs
Verbs