{"id":8806,"date":"2026-01-12T11:36:14","date_gmt":"2026-01-12T10:36:14","guid":{"rendered":"https:\/\/muzeumewolucji.pl\/?p=8806"},"modified":"2026-01-12T11:51:28","modified_gmt":"2026-01-12T10:51:28","slug":"life-in-a-devonian-marine-lagoon","status":"publish","type":"post","link":"https:\/\/muzeumewolucji.pl\/?p=8806&lang=en","title":{"rendered":"Life in a Devonian marine lagoon"},"content":{"rendered":"\t\t
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Life in a Devonian marine lagoonj<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\"\"The article presents an overview of marine environments that existed in the area of present-day Poland around 380\u2013360 million years ago, during the Devonian<\/a> period, when this region was covered by an extensive shallow and warm sea. This sea was oversaturated<\/a> with calcium<\/a>, a component of the common biomineral calcite<\/a>. Specific environmental conditions\u2014elevated calcium concentrations, fluctuating salinity, and microbial activity\u2014favoured the fossilization<\/a> of microorganisms that normally are not preserved in the fossil record. Devonian marine sediments of southern Poland are thus a \u201ctaphonomic<\/a> window\u201d providing insight into ancient microorganisms that typically do not produce calcareous skeletons.<\/p>

Illustration: Calcispheres (a kind of calcareous microfossils) from Sosnowiec IG-1 core with preserved organic matter. A\u2013B. Volvocacean<\/a> calcispheres with preserved cells forming a colony; C\u2013D. Radiospherid (spinose) calcispheres with highly mineralized mucous envelopes around single-celled algae. Scale A the same for B and D. The central chamber of the calcisphere is typically between 30 and 50 \u00b5m.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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PUBLICATION:<\/strong> Racki, G., Pisarzowska,A., Racka, M., Kremer, B.<\/a>, Ka\u017amierczak, J.<\/a> 2025. Middle to Late Devonian calcium-stressed restricted-marine basins as a unique habitat and taphonomic window for calcareous microbiota. Earth-Science Reviews<\/em> 271, 105280<\/a>. doi: 10.1016\/j.earscirev.2025.105280<\/span><\/span><\/p><\/div>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

The article presents an overview of marine environments that existed in the area of present-day Poland around 380\u2013360 million years ago, during the Devonian period, when this region was covered by an extensive shallow and warm sea.<\/p>\n","protected":false},"author":3,"featured_media":8772,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[93],"tags":[],"class_list":["post-8806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sc_news"],"yoast_head":"\nLife in a Devonian marine lagoon - Muzeum Ewolucji Instytutu Paleobiologii PAN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/muzeumewolucji.pl\/?p=8806&lang=en\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Life in a Devonian marine lagoon - 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