Conversation so far:
When did the Animal Style art develop?
animal art of the period roughly from 400 to 900 into three phases: Styles I, II and III.
What distinguished the three styles of animal art from each other?
Style I.
First appears in northwest Europe, it became a noticeable new style with the introduction of the chip carving technique applied to bronze and silver in the 5th century.
What was unique about Style II?
Style II's animals are whole beasts, but their bodies are elongated into "ribbons" which intertwined into symmetrical shapes with no pretence of naturalism, and rarely any legs.
What was Style III art like?
Salin Style III is found mainly in Scandinavia, and may also be called Viking art.
Did a lot of the Animal Style art survive?
CANNOTANSWER.
Are there any other interesting aspects about this article?
The animal becomes subsumed into ornamental patterns, typically using interlace.

Question: What type of materials did they use to create this art?
Self-contained rewrite: What type of materials did the Vikings use to create ornamental patterns?