Discovering Earth's Composition
{"Image DocumentName": "Discovering Earth\u2019s Composition", "Image ImageDescription": "Early seismic data and drilling technology indicate that the continental crust is mostly made of lighter, granitic rocks. The crust of the ocean floor has a baslatic composition. The composition of the mantle and core is known from more indirect data. Scientists use lava and meteorites to infer the composition of the mantle and core. Earth\u2019s core is thought to be mainly dense iron and nickel, similar to metallic meteorites. The surrounding mantle is believed to be composed of rocks similar to stony meteorites.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}