What is the relationship between the words excavated and uncovering in the first paragraph on page 226, found below?

"The challenge for me in writing historical fiction is always how can I see, hear, feel, taste, smell, know what my main character experienced? Luckily for me, the entire Jamestown fort, the three ships, and a Powhatan Indian village have all been re-created at the Jamestown Settlement, complete with historical interpreters, gardens, muskets that really fire (without bullets, of course), corn that needs to be shucked, and all of the artifacts you can imagine. In addition to the Jamestown Settlement, the newly rediscovered original Jamestown fort is being excavated by archeologists. Every day they are uncovering pieces of pottery, building foundations, postholes from the original palisades, and even graves from the early Jamestown years. I spent day after day at those two sites, researching, asking questions, and generally absorbing the feel of it and trying to transport my imagination back in time nearly four hundred years"

Responses

They represent antonyms; they have opposite meanings.
They represent antonyms; they have opposite meanings.

They represent synonyms; they have similar meanings.
They represent synonyms; they have similar meanings.

They represent cause/effect; one causes the other.