Alexis Licht

Alexis Licht
Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement | CEREGE · Climate

PhD

About

101
Publications
45,049
Reads
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Introduction
Alexis Licht currently works at CEREGE, University of Aix-Marseille, France. Alexis does research in Climatology, Geochemistry and Geology.
Additional affiliations
September 2016 - October 2020
University of Washington Seattle
Position
  • Professor (Assistant)
September 2015 - August 2016
Universität Potsdam
Position
  • PostDoc Position
January 2015 - August 2015
University of Kansas
Position
  • PostDoc Position

Publications

Publications (101)
Article
Full-text available
The strong present-day Asian monsoons are thought to have originated between 25 and 22 million years (Myr) ago, driven by Tibetan–Himalayan uplift. However, the existence of older Asian monsoons and their response to enhanced greenhouse conditions such as those in the Eocene period (55–34 Myr ago) are unknown because of the paucity of well-dated re...
Article
The loess and paleosol sequences of the Chinese Loess Plateau are composed of Quaternary dust, the origin of which has been the subject of considerable debate. Some recent U-Pb geochronological studies of eolian zircons have proposed the existence of two major wind pathways: from the north and northwest, through the Badan Jaran, Tengger, and Mu Us...
Article
The onset of modern central Asian atmospheric circulation is traditionally linked to the interplay of surface uplift of the Mongolian and Tibetan-Himalayan orogens, retreat of the Paratethys sea from central Asia and Cenozoic global cooling. Although the role of these players has not yet been unravelled, the vast dust deposits of central China supp...
Article
Located along the İzmir-Ankara-Erzincan Suture (IAES), the Maastrichtian-Paleogene Orhaniye Basin has yielded a highly enigmatic-yet poorly dated-Paleogene mammal fauna, the endemic character of which has suggested high faunal provincialism associated with paleogeographic isolation of the Anatolian landmass during the early Cenozoic. Despite its bi...
Article
The geological history of the Burmese subduction margin, where India obliquely subducts below Indochina, remains poorly documented although it is key to deciphering geodynamic models for the evolution of the broader Tibetan-Himalayan orogen. Various scenarios for the evolution of the orogen have been proposed, including a collision of India with My...
Article
Full-text available
The drivers of the evolution of the South Asian Monsoon remain widely debated. An intensification of monsoonal rainfall recorded in terrestrial and marine sediment archives from the earliest Miocene (23–20 million years ago (Ma)) is generally attributed to Himalayan uplift. However, Indian Ocean palaeorecords place the onset of a strong monsoon aro...
Chapter
The Ayeyarwady River flows for 2170 km to the Andaman Sea from above 3000 m altitude in the Eastern Himalayan Syntaxis. The Ayeyarwady is one of the largest river systems in the world in terms of water and sediment discharge. The Ayeyarwady floodplains have supported agriculture through the Neolithic and successive urban civilizations since the lat...
Article
Full-text available
At the junction of greenhouse and icehouse climate states, the Eocene–Oligocene Transition (EOT) is a key moment in Cenozoic climate history. While it is associated with severe extinctions and biodiversity turnovers on land, the role of terrestrial climate evolution remains poorly resolved, especially the associated changes in seasonality. Some pal...
Article
Full-text available
The Andaman and Nicobar ophiolites, in the forearc of the western Sunda subduction zone, underwent enigmatic, rapid Cenozoic vertical motions: shallow-water sediments with abundant arc debris characterize the middle Paleocene–middle Eocene and are under- and overlain by significantly deeper sediments. Recent paleomagnetic results revealed a near-eq...
Article
The Grande Coupure corresponds to a major episode of faunal turnover in western Europe around the Eocene-Oligocene boundary that is generally attributed to the influx of multiple clades of Asian mammals. However, Asian mammal clades begin to appear in the fossil record of southeastern Europe during the middle Eocene, 5–10 million years prior to the...
Article
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Collision between the Pontides and Anatolide-Tauride Block along the İzmir-Ankara-Erzincan suture in Anatolia has been variously estimated from the Late Cretaceous to Eocene. It remains unclear whether this age range results from a protracted, multi-phase collision or differences between proxies of collision age and/or along strike diachroneity. He...
Article
Full-text available
Across the Miocene–Pliocene boundary (MPB; 5.3 million years ago, Ma), late Miocene cooling gave way to the early-to-middle Pliocene Warm Period. This transition, across which atmospheric CO 2 concentrations increased to levels similar to present, holds potential for deciphering regional climate responses in Asia—currently home to more than half of...
Article
Full-text available
Recent studies suggest increasing sensitivity to orbital variations across the Eocene-Oligocene greenhouse to icehouse climate transition. However, climate simulations and paleoenvironmental studies mostly provide snapshots of the past climate, therefore overlooking the role of this short-term variability in driving major environmental changes and...
Cover Page
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A micrograph (a swamp fern spore 𝙂𝙚𝙢𝙢𝙖𝙩𝙤𝙨𝙥𝙤𝙧𝙞𝙨 𝙜𝙚𝙢𝙢𝙖𝙩𝙤𝙞𝙙𝙚𝙨 with affinity to 𝘾𝙮𝙘𝙡𝙤𝙥𝙝𝙤𝙧𝙪𝙨) in our paper ("𝗔𝘁 𝗮 𝗰𝗿𝗼𝘀𝘀𝗿𝗼𝗮𝗱𝘀: 𝗧𝗵𝗲 𝗹𝗮𝘁𝗲 𝗘𝗼𝗰𝗲𝗻𝗲 𝗳𝗹𝗼𝗿𝗮 𝗼𝗳 𝗰𝗲𝗻𝘁𝗿𝗮𝗹 𝗠𝘆𝗮𝗻𝗺𝗮𝗿 𝗼𝘄𝗲𝘀 𝗶𝘁𝘀 𝗰𝗼𝗺𝗽𝗼𝘀𝗶𝘁𝗶𝗼𝗻 𝘁𝗼 𝗽𝗹𝗮𝘁𝗲 𝗰𝗼𝗹𝗹𝗶𝘀𝗶𝗼𝗻 𝗮𝗻𝗱 𝘁𝗿𝗼𝗽𝗶𝗰𝗮𝗹 𝗰𝗹𝗶𝗺𝗮𝘁𝗲", Huang et al. (2021), https://doi.org/10.1016/j.revpalbo.2021.104441) was selected as the cover image on the cover of volume 2...
Article
Full-text available
Myanmar was shaped by the India–Asia collision, fusion of the Burma Terrane (BT) with Asia, and mountain building. Throughout this process new elevational gradients and habitats were formed, which affected the regional climate, but also forged new dispersal routes into Asia and India. In spite of its importance, the vegetation history of Myanmar is...
Article
Full-text available
High burial temperature and a lack of material for traditional thermal proxies significantly impede the understanding of the thermal history of carbonate stratigraphic sequences in deep time. Carbonate clumped isotope thermometry interpreted through models of solid-state isotopic reordering and in-situ U-Pb dating provides a new methodology for rec...
Preprint
Full-text available
At the junction of greenhouse and icehouse climate phases, the Eocene-Oligocene Transition (EOT) is a key moment in the history of the Cenozoic climate. Yet, while it is associated with severe extinctions and biodiversity turnovers, terrestrial climate evolution remains poorly resolved. Paleobotanical and geochemical continental records suggest a m...
Article
Full-text available
Asian mineral dust has been studied extensively for its role in affecting regional-to global-scale climate and for its deposits, which enable reconstructing Asian atmospheric circulation in the past. However, the timing and origin of the dust deposits remain debated. Numerous loess records have been reported across the Asian continent with ages var...
Article
Paleogeographic maps are essential tools for understanding Earth system dynamics. They provide boundary conditions for climate and geodynamic modelling, for analysing surface processes and biotic interactions. However, the temporal and spatial distribution of key features such as seaways and mountain belts that govern climate changes and biotic int...
Article
Recognition of terrestrial dust in geological records is essential for reconstructing paleoenvironments and quantifying dust fluxes in the past. However, in contrast to eolian sands, silt-sized dust is difficult to recognize in pre-Quaternary records due to a lack of macroscopic features indicating eolian transport and mixing with alluvial sediment...
Article
Full-text available
The Olympic Peninsula is the uplifted portion of the Cascadia accretionary wedge and forms the core of a 200 km scale oroclinal bend on the west coast of Washington State. The accretionary wedge started forming 45 million years ago following the accretion of the Siletzia igneous province along the Cascadia subduction margin. Low-temperature thermoc...
Article
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The first major build-up of Antarctic glaciation occurred in two consecutive stages across the Eocene–Oligocene transition (EOT): the EOT-1 cooling event at ~34.1–33.9 Ma and the Oi-1 glaciation event at ~33.8–33.6 Ma. Detailed orbital-scale terrestrial environmental responses to these events remain poorly known. Here we present magnetic and geoche...
Article
Full-text available
The origins and development of the arid and highly seasonal steppe-desert biome in Central Asia, the largest of its kind in the world, remain largely unconstrained by existing records. It is unclear how Cenozoic climatic, geological, and biological forces, acting at diverse spatial and temporal scales, shaped Central Asian ecosystems through time....
Article
The Burma Terrane (Myanmar) played an important role in the India‐Asia collision and moved over 2000 km northward on the Indian Plate during the Cenozoic, before colliding with the Asian margin. However, the timing of this collision and its correlation to regional uplift phases, sedimentary provenance and basin development, remain poorly constraine...
Article
Full-text available
The Burma Terrane (Myanmar) played an important role in the India‐Asia collision and moved over 2000 km northward on the Indian Plate during the Cenozoic, before colliding with the Asian margin. However, the timing of this collision and its correlation to regional uplift phases, sedimentary provenance and basin development, remain poorly constraine...
Article
Soil respiration (Rs), the production of carbon dioxide in soils, increases dramatically from deserts to forested ecosystems. Rs values thus provide a potential tool to identify past ecosystems if recorded in sedimentary archives. Here, we propose a quantitative method to reconstruct past Rs values from paleosols. This method reverses the soil pale...
Article
A new genus and species of omomyid primate is described from the middle Eocene (Lutetian) Lülük Member of the Uzunçarşidere Formation, Orhaniye Basin, north-central Anatolia, Turkey. This is the first Eocene primate to be reported from the vast area between Switzerland and Pakistan. The new taxon is currently represented by a single dentary fragmen...
Article
The Burma Terrane is a microplate at the eastern edge of the Himalayan-Tibetan orogen, the origin of which remains poorly understood. Its basement comprises metamorphic and igneous rocks forming the Wuntho-Popa Arc (WPA) and has been correlated with Tibetan, Gondwana or Transtethyan rocks. Yet, little is known about the magmatic history of the WPA....
Article
Full-text available
In the Palaeogene, pollen assemblages at low and mid latitudes are characterized by abundant palm and palm-like (PPL) taxa. Although these taxa have been widely reported, their occurrence in the Palaeogene of Myanmar remains poorly documented. Here we report on the morphology of PPL pollen along a middle to upper Eocene sedimentary sequence in cent...
Article
Full-text available
The Cenozoic inception and development of the Asian monsoons remain unclear and have generated much debate, as several hypotheses regarding circulation patterns at work in Asia during the Eocene have been proposed in the few last decades. These include (a) the existence of modern-like monsoons since the early Eocene; (b) that of a weak South Asian...
Article
The Yellow River (YR) is one of the longest and most sediment-laden rivers in the world. However, the timing and mechanism of the integration of upstream and downstream reaches of the YR is still debated, with estimates ranging from >34 Ma to ~0.15 Ma. Here we address this debate by studying the detrital-zircon age spectra from three boreholes that...
Article
The Ancestral Rocky Mountains system consists of a series of basement-cored uplifts and associated sedimentary basins that formed in southwestern Laurentia during Early Pennsylvanian–middle Permian time. This system was originally recognized by aprons of coarse, arkosic sandstone and conglomerate within the Paradox, Eagle, and Denver Basins, which...
Preprint
Full-text available
The Cenozoic onset and development of the Asian monsoons remain unclear and have generated much debate, as several hypotheses regarding circulation patterns at work in Asia during the Eocene have been proposed in the last decades. These include a) the existence of modern-like monsoons since the early Eocene; b) that of a weak South Asian Monsoon (S...
Article
Full-text available
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Article
Full-text available
Convergence between the Indian and Asian plates has reshaped large parts of Asia, changing regional climate and biodiversity, yet geodynamic models fundamentally diverge on how convergence was accommodated since the India–Asia collision. Here we report palaeomagnetic data from the Burma Terrane, which is at the eastern edge of the collision zone an...
Article
Full-text available
Debate persists concerning the timing and geodynamics of intercontinental collision, style of syn‐collisional deformation, and development of topography and fold‐and‐thrust belts along the >1700‐km‐long İzmir‐Ankara‐Erzincan suture zone (İAESZ) in Turkey. Resolving this debate is a necessary precursor to evaluating the integrity of convergent margi...
Article
Valdes et al . contest our results, suggesting failings in our modeling approach as well as in our comparison with data. Although their comment points to interesting ideas of improvement, we find that their critique reflects an incomplete understanding of our methods and is not supported by the material they provide.
Conference Paper
Fossil palm pollen referred to genera such as Longapertites, Spinizonocolpites, Palmaepollenites, and Dicolpopollis, and the palm-like Proxapertites had a very widespread distribution during the Paleogene. Here we investigate the fossil palm pollen within the composition of the latest middle to earliest late Eocene Yaw Formation in the Kalewa regio...
Article
The establishment and evolution of the Asian monsoons and arid interior have been linked to uplift of the Tibetan Plateau, retreat of the inland proto-Paratethys Sea and global cooling during the Cenozoic. However, the respective role of these driving mechanisms remains poorly constrained. This is partly due to a lack of continental records coverin...
Article
Full-text available
Paleotopographic reconstructions of the Tibetan Plateau based on stable isotope paleoaltimetry methods conclude that most of the Plateau’s current elevation was already reached by the Eocene, ~40 million years ago. However, changes in atmospheric and hydrological dynamics affect oxygen stable isotopes in precipitation and may thus bias such reconst...
Article
The fall into the Oligocene icehouse is marked by a steady decline in global temperature with punctuated cooling at the Eocene-Oligocene transition, both of which are well documented in the marine realm. However, the chronology and mechanisms of cooling on land remain unclear. Here, we use clumped isotope thermometry on northeastern Tibetan contine...