page_title: Dike (geology)
hierarchical_section_title: Dike (geology)
caption_attribution_description: English: Basalt dykes, Lord Howe Island
context_page_description: A dike or dyke, in geological usage, is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when sediment fills a pre-existing crack.
context_section_description: A dike or dyke, in geological usage, is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when sediment fills a pre-existing crack.
caption: Vertical basalt dikes cutting horizontal lava flows, Lord Howe Island, Australia
exif: {"Image Make": "SAMSUNG", "Image Model": "SAMSUNG WB650 / VLUU WB650 / SAMSUNG WB660", "Image Orientation": "Horizontal (normal)", "Image XResolution": "96", "Image YResolution": "96", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "1003161", "Image DateTime": "2011:06:07 12:36:49", "Image YCbCrPositioning": "Co-sited", "Image Copyright": "COPYRIGHT, 2009", "Image ExifOffset": "258", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail Orientation": "Horizontal (normal)", "Thumbnail XResolution": "1", "Thumbnail YResolution": "1", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "24966", "Thumbnail JPEGInterchangeFormatLength": "3325", "EXIF ExposureTime": "1/180", "EXIF FNumber": "22/5", "EXIF ExposureProgram": "Landscape Mode", "EXIF ISOSpeedRatings": "80", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2011:06:07 12:36:49", "EXIF DateTimeDigitized": "2011:06:07 12:36:49", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "221869/55488", "EXIF ShutterSpeedValue": "763/100", "EXIF ApertureValue": "427/100", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "427/100", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "163/10", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "3264", "EXIF ExifImageLength": "2448", "EXIF RelatedSoundFile": "RelatedSound", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "24830", "EXIF ExposureIndex": "1", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "0", "EXIF FocalLengthIn35mmFilm": "100", "EXIF SceneCaptureType": "Landscape", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Hard"}