Match the layer of the earth with its best description. 1 . made of large plates that move 5 inner core 2 . plastic portion of the upper mantle of the earth 1 outer core 3 . very dense liquid of iron and sulfur 7 lower mantle 4 . thin, rigid surface of Earth 6 upper mantle 5 . made of solid iron 4 crust 6 . layer that includes the asthenosphere 2 lithosphere 7 . layer just outside of the outer core 3 asthenosphere

Ageologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. as he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. he now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. as he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. he concludes