My ferment has small black specs in it, is this contamination?

This seems to be very similar to this question about hop seeds but I have not used fresh hops, I used pellet centennial hops purchased vacuum packed and frozen from homebrew shop.

Ingredients (1 gallon batch):

• Liquid Amber extract - 1.2 pounds
• Centennial hops - .5 ounces Dry
• Yeast - as per package instructions. cant find the package now, a little embarrassing.

Process:

• 80 minute boil. Stirred in extract during water warming up.

• 0.3 ounces of hops added 20 minutes into boil (for 1 hour of boiling)

• 0.2 ounces added 15 minutes before boil completion.

• Chilled in ice bath until 75 degrees then pitched the yeast. Continued chill until 70 degrees. (Yeast suggested temp range was ~64 to 71.6 degrees. Maximum was 60-78)

• Transferred to carboy, added extra water that had been boiled separately to bring volume up, added blow off tube.

Results:

• Carboy left to rest at 9pm on 2013/6/15

• Fermentation seen at 10am when carboy checked on 2013/6/16

• Fermentation going very well when checked on 2013/6/17 at 4pm.

• Fermentation still going well on 2013/6/18, not as heavy as 17th, but still left blowoff tube on.

• Checked ferment on 2013/6/20, ferment was ready to change over to smaller airlock. Black spots noted.

Image from top of carboy looking down into it, you can see the specs in the bottom right. The glass is foggy from water vapor on the inside, this was the best picture I could get.

I did a poor job of filtering out the hops, long story, they were not well filtered out. First time mistakes.

Is it possible I am just seeing remnants of these hops?