{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.rocking-stone","code":"thing-q1061002","url":"https://ver.cy/models/thing/q1061002/","name":"rocking stone","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.4","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.BLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A large boulder, also called a logan stone or rocking stone, balanced so finely on its base that it can be rocked with slight pressure, usually a natural result of glacial deposition or weathering, occasionally treated in the past as a druidical monument; rocking stones are found in Britain, Ireland, Spain, the United States and elsewhere and are often local landmarks.","purpose":"Let an agent explain rocking stones and how they form, relay notable examples and folklore from geological and antiquarian sources with attribution, describe their status as landmarks, and distinguish rocking stones from erratics in general, from balancing rocks that do not rock and from megalithic monuments.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Rocks under pressure","Natural origin","Folklore","Local landmark"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a rocking stone is.","layers":[{"id":"definition","name":"Definition","description":"Definition.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is a rocking stone, and how does it differ from an erratic, a balancing rock and a megalith?","kind":"definition"},{"text":"Is the question about geology, folklore or a specific stone?","kind":"boundary"}]}]},{"id":"examples","name":"Examples","description":"Examples.","findings":[{"id":"examples-finding","name":"Examples","description":"Examples.","questions":[{"text":"What are notable rocking stones, such as the Logan Rock?","kind":"definition"},{"text":"Which entry fits the specific stone?","kind":"action"}]}]}]},{"id":"geology","name":"Geology","description":"Geology.","layers":[{"id":"formation","name":"Formation","description":"Formation.","findings":[{"id":"formation-finding","name":"Formation","description":"Formation.","questions":[{"text":"How do glaciers and weathering produce rocking stones?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"mechanics","name":"Mechanics","description":"Mechanics.","findings":[{"id":"mechanics-finding","name":"Mechanics","description":"Mechanics.","questions":[{"text":"Why can a heavy boulder be rocked by hand?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"culture","name":"Culture","description":"Folklore and history.","layers":[{"id":"folklore","name":"Folklore","description":"Folklore.","findings":[{"id":"folklore-finding","name":"Folklore","description":"Folklore.","questions":[{"text":"What folklore and antiquarian theories surround rocking stones, with claims attributed?","kind":"provenance"},{"text":"Is the presentation attributed?","kind":"boundary"}]}]},{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did the Logan Rock incident of 1824 unfold?","kind":"provenance"},{"text":"Which entry fits Logan Rock?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"Today.","layers":[{"id":"tourism","name":"Tourism","description":"Tourism.","findings":[{"id":"tourism-finding","name":"Tourism","description":"Tourism.","questions":[{"text":"How are rocking stones protected and visited?","kind":"provenance"},{"text":"Which entry fits geotourism?","kind":"action"}]}]},{"id":"related","name":"Related","description":"Related formations.","findings":[{"id":"related-finding","name":"Related","description":"Related.","questions":[{"text":"What are balancing rocks and tors?","kind":"provenance"},{"text":"Which entry fits balancing rock?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Describe rocking stones, their geology and folklore from sound sources.","Report the location and condition of a known rocking stone to the landowner or heritage body."],"mustNot":["Try to dislodge, topple or move a rocking stone.","Encourage visitors to rock a stone where it can crush people or be damaged.","Present folklore about a stone as geological fact."],"requiresHuman":["Any intervention to stabilise or restore a stone."]},"ethics":{"considerations":["Rocking stones have been toppled by vandals, a permanent loss to landscape and local heritage.","A heavy balanced boulder can injure people if it shifts."],"affectedParties":["Visitors","Landowners","Local communities"]},"owners":{"steward":"The landowner, sometimes under a heritage or nature protection body.","roles":[],"masterSystems":[]},"relations":[{"target":"Q3370053","type":"parent","note":"registry parent class"},{"target":"Q631305","type":"parent","note":"registry parent class"},{"target":"rock formation","type":"related","note":"in registry terms"},{"target":"small monument","type":"related","note":"in registry terms, as a landmark"},{"target":"glacial erratic","type":"related","note":"by origin"},{"target":"Logan Rock","type":"related","note":"in Cornwall"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.rocking-stone","Wikidata: Q1061002 (https://www.wikidata.org/wiki/Q1061002)"]},"properties":{"applicability":"required","items":["Logan Rock, Cornwall: about 80 tonnes","origin: glacial deposition or weathering note","Logan Rock toppled and replaced: 1824 year"]},"recognition":{"applicability":"required","items":["Boulder that rocks on its base","Logan Rock in Cornwall, rocking stones in Wales, Ireland and Galicia","Erratics may be firmly seated; balancing rocks may not move; megaliths are human-made","A large boulder resting on a small contact point on bedrock."]},"capabilities":{"applicability":"required","items":["explain formation","relay examples and folklore","describe landmark status","distinguish related formations"]},"hazards":{"applicability":"required","items":["Vandalism or toppling","Presenting druidic folklore as history","Confusing with balancing rocks"]},"interfaces":{"applicability":"required","items":["Heritage or geological site protection in some places"]},"context":{"applicability":"required","items":["Not applicable; a rock formation.","glacial rocking stones","weathered granite logan stones","rocking stones with folklore or druidic associations","rocking stones as tourist sites"]}},"sources":[{"title":"Wikidata item Q1061002: rocking stone","url":"https://www.wikidata.org/wiki/Q1061002","note":"identity and sense of the item"},{"title":"Wikipedia: Rocking stone","url":"https://en.wikipedia.org/wiki/Rocking_stone","note":"general description of the item"}],"openQuestions":["Should logan stone be a separate entry?","How should geological and antiquarian sources be linked?","How should the registry list notable examples?"],"resources":{"spec":"/models/things/publications/thing-q1061002/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1061002/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T15:04:03Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:53+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}