Spurn Bird Observatory - Information about activities, facilities for birdwatchers, reports, and a collection of articles. Yorkshire Chalk - The geology, stratigraphy and fossils of the chalk of Yorkshire and Lincolnshire. East Yorkshire Coastal Erosion - Causes and processes, pictures, data, lost places, links and references. Hull Geological Society - Information about their activities and research; also offer membership, publications and events details. East Riding Archaeological Society - Community organisation, with field studies group, offering lecture programme, publications and events such as walks and day trips. Includes membership details and social media link. Wikipedia: Spurn - Article on the sand spit on the tip of the south east coast, reaching into the mouth of the Humber, with the North Sea to the east. Includes public contributions with references and related links.