Conversation so far:
What is Columbia Hills?
Spirit reached the first of many targets at the base of the Columbia Hills called West Spur.
What happened after this?
Hank's Hollow was studied for 23 sols.
Why is this significant?
it contains hematite.
This kind of rock can be built in connection with water.
What did the Spirit do?
a detailed analysis with the AXPS-and the Mossbauer instrument.

Question: Is there anything else significant about this time?
Self-contained rewrite: Besides finding hematite, is there anything else significant about a detailed analysis with the AXPS-and the Mossbauer instrument?