Arrange the rock layers from oldest to youngest. Reexamine the rock outcrops if you need to. Record the order in the Student guide. Basalt
Limestone with unknown fossil
Sandstone with trilobite
Shale with ammonite

It should be sand stone then shale then lime stone and then basalt. This is cause the sand and trilobites were at the bottom of the ocean the shale and ammonite were above them but not above lime. Basalt is last because it’s caused by lava or hot matter cooling quickly in water so lime has to be below basalt yet above sand and shale. The fossil in lime wouldn’t be below trilobites or ammonites because they were some of the first.

Bidk