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On 7 March 2023, a lecture day commemorating the 100th anniversary of the Czech Geological Society was held in the premises of the Czech Academy of Sciences at Národní St. in Prague 1. A total of nine lectures covering the history of the Earth in terms of stratigraphy were presented here. The Institute of Geology of the Czech Academy of Sciences was represented by the talk on buried Quaternary soils by Lenka Lisá and the talk on the Anthropocene issue by Václav Cílek.

Trilobite larvae played a crucial role in the Ordovician food chain. Lukáš Laibl (GLI CAS) with his colleagues from the University of Lausanne published a new study in which they showed that planktic larvae evolved in trilobites about 495 to 470 million years ago. These tiny stages then served as an intermediate link in the food chain for larger swimming organisms that could not directly feed on tiny planktic algae. The paper was published in Palaeogeography, Palaeoclimatology, Palaeoecology. A press release was also issued by the Czech Academy of Sciences.

Cherts are peculiar rocks that contain very high proportions of silica, deposited on the ocean floor from the Archean onwards. In the Bohemian Massif, cherts form characteristic rocky ridges, notably in the area of the Křivoklátsko Protected Landscape Area and in the southern part of the Brdy Mts. A new study, significantly contributed by scientists of the Institute of Geology, was published in the journal Geoscience Frontiers. It is a complex study of tens of localities with these rocks, revealing that chert formation was intimately associated with low-temperature hydrothermal activity. This was located directly on the ocean floor or on slopes of seamounts in late Proterozoic to early Cambrian times in response to a global change in silicon concentration in seawater.

More than a century ago, English geologist Edward Greenly described a specific sequence of rocks on the island of Anglesey in Wales, which he called "Mélange" after the French word for a mixture. Mélange is formed in the so-called accretionary wedges – that is, where lithospheric plates slide one beneath another (subduction zones). A team of geologists of the Faculty of Science, Charles University and the Institute of Geology of the Czech Academy of Sciences visited the site this year for sampling and subsequent analysis.