Captain's log - Stardate 2261.384

I don't know what that damned portal is made from, but our weapons weren't doing any noticeable damage. I shifted my orders to concentrate enough firepower to reduce the area around the portal into a molten mass and keep it that way until the portal sank.

We stopped firing once all of the portal was below the surface. Spock estimates it might take over a month for the rock to reharden, but after a thick crust formed over where the portal used to be, the time distortions stopped. Good enough for me.