I used white dotted outlines a few times and chose earthy colours for my card. Also, the white stamping on Kraft cardstock reminds me of the rock art.
And a close up:
I have enjoyed participating in these challenges, even though I only just scraped in with them!Hope you have enjoyed looking at my cards.
Cardstock - Chocolate Chip, Kraft, Always Artichoke
Ink - Whisper White, Chocolate Chip, Always Artichoke
Stamps - Eastern Blooms, Great Friend
Accessories - Martha Stewart twill ribbon, white gel pen