Abstract During the current trend of the energy transition, many stratigraphic intervals that previously were thought as uneconomical from an oil and gas business perspective are being re-evaluated for low-carbon energy resource potential such as geothermal. This study presents a case study from the Vienna Basin, Austria, where the Early Badenian Rothneusiedl Formation has been targeted for a re-evaluation, utilizing existing sparse subsurface datasets of vintage quality. The historical cores were subjected to diverse analytical techniques covering sedimentological, petrophysical and thermophysical aspects. These analysis techniques provided the fundamental lithological characteristics and led to the creation of a synthetic conceptual sedimentological log, resultant selection of samples for further analyses, as well as the creation of gross depositional environment maps. The reservoir and thermal properties guided by the core-based lithofacies were required for evaluating the feasibility of the target strata. Overall, the limited and historical cores provided significant and robust data that proved crucial for assessing uncertainties and identifying sub-areas of the Vienna Basin for harnessing geothermal energy. This study demonstrates an important case example of the utilization of historical cores to their maximum potential and reiterates the value of core-derived data amongst digital technologies of the twenty-first century.

ABSTRACT The nineteenth century was the dawn of scientific and systematic paleontology. The foundation of Natural History Museums—built as microcosmic “Books of Nature”—not only contributed to the establishment of this new discipline but also to its visual dissemination. This paper will take the metaphor of the “book” as a starting point for an examination of the paleontological exhibition at the Natural History Museum in Vienna. In keeping with “Natural Theology,” the earliest natural science museums in Britain were designed as expressions of the medieval idea of the “Holy Book of Nature.” Contrary to this, the Natural History Museum Vienna, opened in 1889, wanted to be a nonreligious museum of evolution. Nevertheless, the idea of the “book” was also influential for its design. According to the architects and the first director, it should be a modern “walk-in textbook” instructive for everyone. The most prominent exhibition hall in the museum is dedicated to paleontology. The hall’s decorative scheme forms a unique “Paleo-Gesamtkunstwerk” (Gesamtkunstwerk: total piece of art). The use of grotesque and mythological elements is a particularly striking feature of the hall’s decoration and raises the question of how this relates to the museum’s claim to be a hard-core science institution. As it was paleontology’s task to demystify the monsters and riddles of Earth history systematically, it seems odd that the decorative program connected explicitly to this world. This chapter sheds light on the cultural traditions that led to the creation of this ambiguous program that oscillates between science and imagination. Looking at the results of the research on the nature of the earth, one looks into a book that contains the oldest history we humans know. With amazement, we see the wonders of the first epochs of the earth arising before our mind’s eyes, and what until recently have been incomprehensible hieroglyphs is now almost completely clear to us. How many fables may have been created by the sudden appearance of prehistoric structures in the form of animals and plants? No fairy tales, no fantasies, tangible reality now stands before us and yet no less wonderful, even more wonderful, and this miracle has been achieved by science, the restless seeker. —J. Hoffmann (undated, ca. 1885, p. 1; translation from German)

Abstract For the first time, we present a decadal-scale stable isotope record (δ 18 O, δ 13 C) of 67 speleothem calcite samples coming from an artificial tunnel network located in Graz, Austria. Stable isotope data are interpreted with the help of time series (TS) analysis of mean air temperatures (MAT) and mean annual precipitations (MAP) that have been monitored and recorded in a neighbouring meteorological station. Speleothem records have proved to be very useful in reconstructing changes of environmental conditions. For studied stalagmites, which grew between 1945 and 2018, the δ 18 O values average −18.64‰ and range from −23‰ to −17‰ (VPDB, Vienna Pee Dee Belemnite), suggesting variable climatic conditions. The δ 18 O values of calcite increase along the growth axis and are correlated with high temporal resolution MAT, MAP and weighted mean annual δ 18 O of precipitations. For the same time interval, while the temperature TS show an increasing trend, with a steeper gradient since the 1980s, the precipitation TS presents a weak decreasing tendency. Increase in the δ 13 C values of speleothems from −33‰ to −24‰ (VPDB) is correlated with increasing temperature and drought, associated CO 2 degassing and soil erosion over the tunnel system.

ABSTRACT The Cretaceous-Paleocene (K/P) boundary intervals are rarely preserved in successions of shallow-water limestones. Here, we describe a shallow rocky shore on the active orogenic wedge of the eastern Alps (Austria) fringed by a carbonate platform that was largely cannibalized by erosion. We compared this succession with similar nearshore environments globally, as well as the deep sea, to gain a better understanding of the environmental response to the K/P boundary transition. In the eastern Alps, Cretaceous and Paleocene lithofacies across the K/P boundary transition are separated by a hardground that formed during subaerial exposure and that terminates Upper Maastrichtian limestone with planktic foraminiferal assemblages deposited at neritic depth during zone CF3 (ca. 66.500 Ma). Above the hardground, there are beachrocks with early Danian zone P1a(1) assemblages, which indicate the hardground spans about ~600 k.y. of nondeposition and/or erosion. During the early Danian, the marine transgressive fringe fluctuated between “shoreface to emersion” environments, depositing limestones rich in bryozoans, rhynchonellids, coralline algae, and rare planktic foraminifera along with abraded, bored, and/or encrusted clasts eroded from older rocks. Repeated short subaerial exposure is marked by vadose diagenesis and hardgrounds, including an ~1.5 m.y. interval between magnetochrons C29n to C28n and planktic foraminiferal zones P1b to P1c(2). Comparison with platform carbonate sequences from Croatia, Oman, Madagascar, Belize, and Guatemala, as well as nearshore siliciclastic environments of southern Tunisia, Texas, and Argentina, across the K/P boundary transition revealed surprisingly similar deposition and erosion patterns, with the latter correlative with sea-level falls and repeated subaerial exposure forming hardgrounds. Comparison with deep-sea depositional patterns revealed coeval but shorter intervals of erosion. This pattern shows a uniform response to the K/P boundary transition linked to climate and sea-level changes, whether in shallow nearshore or deep-sea environments, with climate change tied to Deccan volcanism in magnetochrons C29r-C29n.

ABSTRACT The Natural History Museum Vienna is one of the most important museums of natural history in the world. Its collections date back to the year 1750, when the Emperor Franz Stephan of Lorraine (Franz I. Stephan) purchased (from Italy) what was then the largest and most famous collection of natural history specimens. The meteorite collection of the Natural History Museum in Vienna, Austria, has the longest history of all comparable collections in the world. In the second half of the eighteenth century, soon after the foundation of the Imperial Natural History Cabinet in 1750, the Viennese curators began to collect meteorites. Although the first curators neither believed in the extraterrestrial origin nor accepted—in several cases—the written and witnessed histories of these allegedly “heavenly” stone and iron masses, they preserved them in the Natural History collection. Among the first acquisitions were the historical important meteorites Hraschina (Agram), Tabor, Krasnojarsk (Pallas iron), and Eichstädt. These and other well-documented specimens from the Vienna collection were, for example, used by E.F.F. Chladni for his seminal treatises of 1794 and 1819, respectively. The central figure in the early history of the collection is Carl von Schreibers (1775–1852). After the fall of the Stannern meteorite in 1808, he availed himself of every opportunity to acquire meteorite specimens. His continued interest in meteorites laid the foundation for the Vienna collection to be of the historical and scientific importance it is today. Due to the efforts of Schreibers, who also is regarded as founder of meteoritic science in Vienna, and his successors, the Vienna collection became the largest and most extensive in the course of the nineteenth century. In terms of the geological and paleontological collections, early expeditions and collecting campaigns were mainly targeting exotic animals and plants, while paleontological objects were welcome but subordinate. It was only in the early nineteenth century that the paleontological collections were—literally and figuratively speaking—systematically enlarged. Internationalization and diversification became the focus of the collection strategy. The paleontology collections at the Vienna museum also became important in the Darwinian view of evolution.

Abstract: There is no consensus about the rate and style of clay mineral diagenesis in progressively buried sandstones v. interbedded mudstones. The diagenetic evolution of interbedded Miocene sandstones and mudstones from the Vienna Basin (Austria) has therefore been compared using core-based studies, petrography, X-ray diffraction and X-ray fluorescence. There was a common provenance for the coarse- and fine-grained sediments, and the primary depositional environment of the host sediment had no direct effect on illitization. The sandstones are mostly lithic arkoses dominated by framework grains of quartz, altered feldspars and carbonate rock fragments. Sandstone porosity has been reduced by quartz overgrowths and calcite cement; their pore-filling authigenic clay minerals consist of mixed-layer illite–smectite, illite, kaolinite and chlorite. In sandstones, smectite illitization progresses with depth; at 2150 m there is a transition from randomly interstratified to regular interstratified illite–smectite. The overall mineralogy of mudstones is surprisingly similar to the sandstones. However, for a given depth, feldspars are more altered to kaolinite, and smectite illitization is more advanced in sandstones than in mudstones. The higher permeability of sandstones allowed faster movement of material and pore fluid necessary for illitization and feldspar alteration than in mudstones. The significance of this work is that it has shown that open-system diagenesis is important for some clay mineral diagenetic reactions in sandstones, while closed-system diagenesis seems to operate for clay mineral diagenesis in mudstones.