La Matilde Formation
From the Bathonian age ( 164 . 7 to 167 . 7 million years ago ) to the Kimmeridgian age ( 150 . 8 to 155 . 7 million years ago ) at the latest . 
<triplet> Bathonian <subj> age <obj> instance of <triplet> Kimmeridgian <subj> age <obj> instance of