page_title: List of dinosaurs of the Morrison Formation
section_title: Diplodocids
hierarchical_section_title: List of dinosaurs of the Morrison Formation / Sauropods / Diplodocids
caption_attribution_description: Català: Diplodocus hallorum (antigament conegut com a Seismosaurus),. Deutsch: Seismosaurus hallorum, Lebendrekonstruktion. English: "Seismosaurus". Seismo (Diplodocus hallorum). Diplodocus. D. hallorum (formerly known as Seismosaurus). Diplodocus was one of the longest dinosaurs. Español: D. hallorum. Français&#160;: Diplodocus hallorum. Magyar: D. hallorum (korábbi nevén Seismosaurus). 日本語: D. hallorum （ディプロドクス・ハロルム［シノニム：セイスモサウルス・ハロルム］）の生態復元想像図. Polski: Sejsmozaur. Русский: Diplodocus hallorum — «сейсмозавр», длина до 36 м. Kiswahili: Uchoraji wa Diplodocus. 中文: Diplodocus hallorum，原為地震龍.
context_page_description: The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light grey, greenish gray, or red. Most of the fossils occur in the green siltstone beds and lower sandstones, relics of the rivers and floodplains of the Jurassic period.
caption: Diplodocus hallorum
exif: {"Image Tag 0x000B": "ACD Systems Digital Imaging", "Image Orientation": "Horizontal (normal)", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS3 Macintosh", "Image DateTime": "2009:05:14 19:05:40", "Image ExifOffset": "204", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "342", "Thumbnail JPEGInterchangeFormatLength": "3079", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "900", "EXIF ExifImageLength": "335"}