If the steering in your truck is getting loose, you might need to replace your idler arm or your pitman arm (or both). We'll show you how to replace them. If the steering in your truck is getting loose, you might need to replace your idler arm or your pitman arm (or both).
Ammonites are the most widely known fossil. They are cephalopods  and first appeared in the seas 415 million years ago, in the form  of a straight shelled creature known as â¦ Bacrites. They do not have  legs.
Ammonites were similar in shape and form to the modern Nautilus. They were very common in the oceans of the Paleozoic and Mesozoic eras, 400 to 65 million years ago, evolving in the Devonian Period. Fossil shells as small as 3 mm and as large as 3 m have been found.