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Die Mächtigkeit der quartären Ablagerungen der verschiedenen Eiszeitalter reichen von wenigen Mete...","free_access_class":"FREE_NO_AUTH","auth_type":"NONE","homepage_url":"https://geodienste.hamburg.de/HH_WFS_Praequartaerer_Untergrund?SERVICE=WFS&VERSION=1.1.0&REQUEST=GetFeature&typename=de.hh.up:praequartaerer_untergrund","docs_url":null,"repo_url":null,"status":"ACTIVE","verification_state":"VERIFIED","tags":[],"logo_url":"https://www.google.com/s2/favicons?sz=64&domain=geodienste.hamburg.de","primary_source_url":"https://geodienste.hamburg.de/HH_WFS_Praequartaerer_Untergrund?SERVICE=WFS&VERSION=1.1.0&REQUEST=GetFeature&typename=de.hh.up:praequartaerer_untergrund","extraction_confidence":"0.00","created_at":"2026-07-19T09:16:16.180Z","updated_at":"2026-10-17T14:33:17.363Z","last_verified_at":"2026-10-17T14:33:17.363Z","deprecated_at":null,"ranking_score":56,"last_ranked_at":"2026-10-07T08:54:34.227Z","last_seen_at":null,"last_validated_at":null,"last_uptime_at":null,"popularity_score":"0.0000","maintenance_score":"0.7000","institution_id":null,"institution_type":null,"country_code":"DE","official_confidence":0,"proof_summary":"Confidence: 0%","source_seed_url":null,"is_public_sector":true,"published_at":"2026-07-19T20:13:17.966Z","geographic_scope":"NATIONAL","name_en":"Geological Map of the Pre-Quaternary Subsurface 1:50,000 Hamburg","description_en":"This WFS provides the Geological Map \"Pre-Quaternary Subsurface 1:50,000\" for the city of Hamburg, published by LGV Hamburg (Landesbetrieb Geoinformation und Vermessung). The entire Hamburg urban area is covered by Quaternary sediments, so this map depicts the geological subsurface with these Quaternary layers removed, showing the older strata beneath. The thickness of the overlying Quaternary deposits, formed during various ice ages, varies considerably across the city, ranging from just a few metres to much greater depths. 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