Answer Happy

(Image source: http://museum.gov.ns.ca/fossils/gallery/specimen). In the image above, (source: http://museum.gov.ns.ca/fossils/gallery/specimen) there is a chunk of limestone containing shell fossils, now displayed in a museum. The living clams died, the individual valves came apart so you have single shells like (and not double shells like (). Waves deposited the shells on a beach, they were then glued together with other things to make the rock, and the rock was collected and brought to the museum. A bright, concentrated light was brought in to illuminate the chunk of limestone for the picture, and the light is shining along the arrow, from the upper right. Are the shells the way they were deposited, or, after the shells were glued together to form the rock, has the rock been turned over? O The way they were deposited. 1 cm O Turned over.