How the hell did we get so many seeds? also it's snowing
Me and Waru have been foraging overnight. I've also done a lot of exploring and I now have pretty much the entire island we're on mapped with some waypoints included, I'll post a picture here in a minute.
Edit;
Here's the overall map:

The most important point I think is the bit where Malachite and Sphalerite are marked:

Not only did I find two pieces of Malachite close to each-other I also found FIVE pieces of Sphalerite within about 15 blocks of each-other. Chances are that this indicates the presence of a very large vein of Sphalerite at this point. To make finding it easier I dug shallow holes in the ground at the points where I found each piece