Historisk geologi

I serien Geologisk Set udkommer nu sidste bog, som handler om Sjælland og det sjællandske ørige. Bogens indledning handler om naturens og landskabets udvikling igennem de sidste 70 millioner år. Den centrale del af bogen gennemgår en lang række lokaliteter, der har national, regional og, i enkelte tilfælde, international betydning.Under hvert kapitel findes en beskrivelse af lokalitetens værdi for forskning, undervisning, turisme og samfundstekniske undersøgelser. Dette suppleres med forslag til, hvordan lokaliteten kan beskyttes. Behandlingen af hver lokalitet afrundes med henvisning til litteratur, turistbrochurer og ejerskab.Geologisk Set - Sjælland og øerne udgives af GO Forlag i samarbejde med GEUS (De Nationale Geologiske Undersøgelser for Danmark og Grønland) og Institut for Geovidenskab og Naturforvaltning, Københavns Universitet, som et fælles projekt under GeoCenter Danmark.

The little-known history of how the Sahara was transformed from a green and fertile land into the largest hot desert in the worldThe Sahara is the largest hot desert in the world, equal in size to China or the United States. Yet, this arid expanse was once a verdant, pleasant land, fed by rivers and lakes. The Sahara sustained abundant plant and animal life, such as Nile perch, turtles, crocodiles, and hippos, and attracted prehistoric hunters and herders. What transformed this land of lakes into a sea of sands? When the Sahara Was Green describes the remarkable history of Earth's greatest desert-including why its climate changed, the impact this had on human populations, and how scientists uncovered the evidence for these extraordinary events.From the Sahara's origins as savanna woodland and grassland to its current arid incarnation, Martin Williams takes us on a vivid journey through time. He describes how the desert's ancient rocks were first fashioned, how dinosaurs roamed freely across the land, and how it was later covered in tall trees. Along the way, Williams addresses many questions: Why was the Sahara previously much wetter, and will it be so again? Did humans contribute to its desertification? What was the impact of extreme climatic episodes-such as prolonged droughts-upon the Sahara's geology, ecology, and inhabitants? Williams also shows how plants, animals, and humans have adapted to the Sahara and what lessons we might learn for living in harmony with the harshest, driest conditions in an ever-changing global environment.A valuable look at how an iconic region has changed over millions of years, When the Sahara Was Green reveals the desert's surprising past to reflect on its present, as well as its possible future.

"This richly illustrated book is both a visitor's guide to one of Southwestern Ontario's most striking landforms - the Elora Gorge on the Upper Grand River - and a thorough, accessible introduction to its natural and recent human history. The book introduces rivers that flow in bedrock, between rock walls and through precipitous gorges, unlike the subdued terrain that the last Ice Age bequeathed most of Southwestern Ontario. It then leads the visitor to three viewpoints on and three excursions through the gorge, with a wealth of information about its rocks, fossils, caves, cliffs, rockslides, rockfalls, floods and erosional processes. It takes the reader through five "Ages" of the gorge. In the First Age the gorge bedrock originated as reef limestone 430 million years ago in prehistoric tropical seas. The Second Age saw the gorge rocks make a great, 400-million-year journey from tropical seas to the heart of a continent via plate tectonics. In the Third Age, the retreating Laurentide Ice Sheet created conditions 17,000 to 15,000 years ago in which ice lobes, glacial lakes and meltwater spillways interacted to incise the gorge in an ice-free area known as the Ontario Island. In the Fourth Age the gorge, nestled in an immense forest, developed at a slower pace moderated by dense woods, fallen branches and beaver dams. In the Fifth Age, the gorge entered the Anthropocene as European settlers came to disrupt and dominate its development and unlock its secrets. Full of original photographs, maps and diagrams, this authoritative guide to the Elora Gorge will fascinate visitors and researchers alike."--

For most people, planet Earth's icy parts remain out of sight and out of mind. Yet it is the melting of ice that will both raise sea level and warm the climate further by reducing the white surfaces that reflect solar energy back into space. In effect, our icy places act as the world's refrigerator, helping to keep our climate relatively cool. The Icy Planet lays out carbon dioxide's role as the control knob of our climate over the past 1000 million years, then explores what is happening to ice and snow in Antarctica, the Arctic and the high mountains.

A "how to" guide to the geology, geomorphology, anthropology, and archaeology of tsunamis and a personal story of a researcher's experience in the field and laboratory, In Search of Ancient Tsunamis takes readers on a journey through the sophisticated and interdisciplinary world of tsunami science.

WINNER OF THE BEST MIXED MEDIA BOOK AWARD AT THE CREATIVE BOOK AWARDS 2024

This is the first complete biography of James Hutton, the father of modern geology, who was also a man of immensely wide-ranging intellectual achievements and one of the Scottish Enlightenment's brightest stars.

Illustrated with 200 barn sketches, diagrams, and maps, this book takes you on a journey through the St Croix River Valley. It grounds you in the geography, geology and biology of the region and introduces you to its original inhabitants, the Dakota and Ojibwe peoples, European explorers, fur traders and loggers and the settlers that followed them. It is a celebration of regional diversity and architectural expression through a single type of building--the barn.

Bayou City: An Anglers ParadiseThe fourth-largest city in the U.S. has a secret hiding in plain sight: All that water means its a fabulous place for fly fishing. Travel no further than to the citys concrete flats to stalk carp with Houstons iconic skyline as a backdrop. Just outside the metro area, wade in the secluded spring-fed waters of the Pineywoods to find spotted bass, largemouth bass, and a variety of panfish. Launch a canoe or kayak in nearby lakes and backwaters to search for gar and bowfin. Add some adventure with a trip to Village Creek, a fascinating biozone where bass and catfish thrive along with four varieties of carnivorous plants and 35 species of orchids. With Fly Fishing Houston & Southeastern Texas as your guide, discover the rewards for anglers this unique region offers, from inside the city limits to the countryside beyond.38 detailed on-the-water descriptions of wades located on 12 unique streams and waterwaysDescriptions of access points for paddles in local lakesSuggestions for creating personalized fly boxes for southeastern TexasMore than 300 color photographs, including close-ups of the key sport fish availableQR codes supplying GPS coordinates for optimal parking for each wade locationRecommendations for the best gear to get started fly fishingAngler-friendly breweries and fly shopsLocal history, info, and eventsInsider tips for sneaking up on fish An overview of current water use regulations in the Houston area and how anglers can help keep streams, creeks, bayous, and even ditches available to fly fishing enthusiasts

Nichts Neues von der Eiszeit? Weit gefehlt! Seit Erscheinen der ersten Auflage dieses Buches sind nur knapp zehn Jahre vergangen, aber in dieser Zeit haben Forscher weltweit neue Untersuchungsmethoden entwickelt und die Ergebnisse ihrer Forschung in Fachzeitschriften publiziert. Dadurch haben sich die Vorstellungen vom Ablauf des Eiszeitalters drastisch gewandelt. Weitere Untersuchungen sind erforderlich. Die Abfolge der einzelnen Eisvorstöße, die Bewegungsrichtung der Gletscher und die Schüttungsrichtung der Schmelzwässer sind erst zum Teil bekannt, aber sie lassen sich rekonstruieren. Dieses Buch informiert Sie über den Stand der Untersuchungen.Als Eiszeitalter werden die Abschnitte der Erdgeschichte bezeichnet, in denen mindestens eine Polarregion vergletschert oder von Meereis bedeckt ist. Wir leben also zurzeit in einem Eiszeitalter. Das jetzige Eiszeitalter ist auch der Zeitabschnitt, in dem der Mensch in die Gestaltung der Erde eingreift. Welche Veränderungen das mit sichbringt, kann jeder selbst verfolgen. Anhand von Luft- und Satellitenbildern kann das Abschmelzen der Gletscher, der Zerfall des arktischen Dauerfrostbodens und die Rodung des brasilianischen Regenwalds nachvollzogen werden. Die Auswertung präziser Vermessungsdaten erlaubt Einblicke in die Naturlandschaft, die bisher weder durch Luft- oder Satellitenbilder noch durch Geländebegehung gewonnen werden konnten. Alle relevanten Daten sind frei verfügbar; dieses Buch beschreibt, wie man sie erhält.Der Autor Dr. Jürgen Ehlers hat als Geowissenschaftler Forschungsprojekte im In- und Ausland durchgeführt. Zusammen mit Prof. Philip L. Gibbard, Cambridge, hat er für die International Union for Quaternary Research das Projekt 'Extent and Chronology of Quaternary Glaciations' geleitet, an dem 170 Wissenschaftler aus 50 Ländern beteiligt waren. Gibbard und Ehlers zählen zu den besten Kennern der Eiszeitgeologie und wurden 2020 mit der Verdienst-Medaille der Deutschen Quartärvereinigung (DEUQUA) ausgezeichnet. Ehlers ist Autor mehrerer Bücher über das Quartär (Enke und Wiley) sowie über die Nordsee (WBG) und ist auch als Autor von Kriminalgeschichten bekannt.

This is the English translation (and German facsimile) of Wladimir Köppen and Alfred Wegener (1924): The Climates of the Geological Past (Die Klimate der geologischen Vorzeit), a landmark text of early paleoclimatological research, actually a textbook of paleoclimatology. Wegener is best known for his theory of continental drift (The Origin of the Continents and Oceans, 1915). Less widely known, but equally important, are the studies he conducted on the climates of the past (with his colleague and father-in-law, Wladimir Köppen), which they jointly published (this book). Only one edition of the book was published, but unfortunately, all - save a few private copies - were destroyed during the second World War, rendering the book essentially unavailable. This English translation makes Köppen and Wegener's landmark text accessible to the international climate research community. It also includes the Supplements and Corrections by ­Wladimir Köppen to this book, published in 1940, shortly before his death and a decade after Alfred Wegener's untimely death on Greenland. The translation (and the facsimile) have both been enhanced by subject indices, which the original book was lacking. The discussion of the course and causal relationship of climates and climate change in the geological past are of principal scientific interest. Important elements of the discussions herein stem from the close collaboration with Milutin Milankovitch (who contributed entire sections of text, but is not named as an author). Building on the principles of the Milankovitch frequencies allowed Köppen and Wegener for the first time, early in the last century to establish a precise time scale of Late Cenozoic glacial-inter­glacial cycles. More recently, the orbital parameters originally calculated by Milankovitch were refined using time series data from deep-sea sediments and ice cores. Furthermore, Milankovitch's cycles may be extrapolated into the future to predict climate change. This very book, in which Köppen and Wegener roll out their theory, is therefore an important publication which has early on shaped our understanding of how climate has evolved and continuously evolves in the course of time. This translation affords non-German-speaking scientists and laypersons alike access to the full and compelling arguments of climate change, carefully and readably laid out and argued. It is a must-read for anybody interested in climate change, be it from a historic or present point of view.

Glenn Christian: NARREN — Med tegninger af Rolf NowotnyGlenn Christians nye digtsamling Narren er ikke fortsættelsen men prologen til hans forrige bog Taarn (Antipyrine, 2021). Den røde tråd er afløst af sorte huller, så bøgerne kan læses uafhængigt af hinanden. Narren præsenterer igen en verden under forvandling, i flammer, det brænder under poterne på bogens hovedaktør: Dyr. En flok jægerlignende gespenster løber rundt og slår, mens Dyr bestræber sig på at leve, være, spise, sove og vågne op. Bogens tid og landskab mimer Perm, en tør og varm vind midt i hård kulde, sneklædte bjerge og lyden af GNUUFFFFF, en palæontolog fremfor præstens amen.