Paleogeography - Science topic
Palaeogeography (also spelled paleogeography) is the study of historical geography. Most often the term is used to describe the physical landscape, although it can be used to reference the human or cultural environment.
Questions related to Paleogeography
I'm interesting in know the periods during the Miocene where the Balearic Islands could have been submerged and, the periods (before the Messinian) where the islands could have been connected to the Iberian Peninsula.
I m very interested in Paleogene continental north Africa, manily because of the "strange position" of Laurasiatherian mammals living there that times.
But I have not found many things about paleogeography constraints.
Can you suggest me one or more articles about this topic?
I think we can share an article about the paleozoic reservoir charcteristics from outcrop sample , which i have some them. They are important for future exploration in kurdistan region.
with best wishes and regards
I am looking for current bibliography (books, articles...) about biogeography, specially about oceans, marine paleogeography and marine biodiversity patterns of distribution
I am trying to import point data (e.g. Sample locations) into Gplates so that I can track their relative positions in time within a palaeographic/palaeotectonic model. There seems to be no obvious way of doing this and yet this seems to me to be an obvious potential function for Gplates to have on order to place a study area into some kind of palaeographic context.
In the study of paleogeographic restoration, most of the current mainstream achievements are formed at latitude. Does anyone study ancient geographical restoration based on longitude and latitude? If someone does this, it will be of great significance to me. In combination with my research, high-accuracy longitude and latitude will be very important.Based on the data I currently collect, almost all of them are based on latitude and not based on longitude.Maybe my question can be a topic of discussion.
We plan to have several of coral limestone samples get dating through electron spin resonance (ESR). However, since this is the first we are considering conduct such an experiment, we have no idea where we can send our samples to. Is there anyone can kind recommend us some famous and reliable intutitions/labs/incs that is open for samples from other institutions? We do appreciate.
I made my thesis on the tectonometamorphic and magmatic evolution in the northwestern part of Burundi in 1988. In the conclusions of my research I presented a hypothesis of the geological evolution which was in disharmony with the hypotheses that were formulated And which have not yet changed. For the moment I co-supervise a thesis at the KUL which addresses the geological context of coltan mineralization in pegmatites in northern Burundi. As an active member I could share with you and co-publish the results of our research. Thanks for the feedback
The request can be analyzed with the contribution of Damien Delvaux an Max Fernandez.
I have read all the publications of Villeneuve, many observations made in the Kivu have been also made in the NW Burundi
I want to determine the sediment rate of N and P in water volume for small reservoirs covering less than 3 ha. The referenced documents are old , and i can not download them. Who can give me some good suggestions? Thanks
In continuation of our search for more lithic artifacts from Ayodhya hills, Purulia, West Bengal, last month found this tool provisionally identified as Core-tool side scraper; likely to be of mid-paleolithic age. Expert opinion sought.
I need a confirmation of the age of alluvium sediments in which we found a macro flora fossils. The fossils have wide stratigraphic range, but 41 percent of them are from the Early Pliocene. The rest of the fossils are also presented in the Early Pliocene. That is why I need a second dating method, the strata is rich of Limonite. If we could date it we will have the age of tha strata confirmed by another source.
I have some samples from the Upper Cretaceous shale, North America.
I was able to obtained SEM images for what I believe some foraminifera genera; they are benthic forams. So far I identify some of them as possible as I can, but how I can be sure if my identifications are correct? Any suggestions?
Please see the attachment files as examples for some of the forams I found.
How to study Cretaceous benthic foraminifera from fragile carbonate material? You can also suggest suitable literature.
I need to contact with an specialist on calcareous sponges with chaetetid organization from the Neogene. Someone knews any people working on this? Thanks a lot.
The 1975 lexicon of Qatar states that the Cretaceous Mauddud Formation got its name from that locality near Dukhan.
The name was assigned by Dr. F.R.S. Henson in an unpublished 1940 report. Does anybody have that report?
A 1948 geological report on the Dukhan anticline by Dr. Max Chatton says "Ain Mauddud has a little water spring on the seashore". Does someone know where that water spring is/was?
Any help would be appreciated. This is related to my current research on the silica of the Rus Formation
I found the original description and the quotations of Delbos & Koechlin-Schlumberger (1867), Fallot (1894) and Rovereto (1897). Many thanks. Michele
I am looking for a comparative table where various deltas are analysed on their characteristics, e.g. to name a few ..
* characters (delta types)
* drainage area and pattern
* Provenance sources
* Shelf area (if exist)
* Sand vs clay content
* organic matter
Any link to papers or textbooks is highly appreciated :)
Many thanks in advance,
While taking traverses along hilly stream in Rajgir, Bihar, India, came across a few bed-load rock samples that looks like tools- artifacts. Expert opinion sought.
I ask this question concerning dating techniques using hydrology for stone tools because it seems to me that the moisture absorption rates should be affected by the type of use. For example an obsidian blade used for scraping flesh from bones may have a higher absorption rate than the same type and shape of tool used for only leather working. Are there any studies out there that contradict this idea?
A question for paleontologists"
Does anyone know if Acervulina linearis and Haddonia heissegi thrived during the miocene and or only during paleogene?
I need complete methodology about sampling procedure, lab analysis and measurements and the instrument required for these studies.
I HAVE NOW RECEIVED A PDF FROM CHRIS CLEAL. THANKS TO EVERYONE WHO ANSWERED!
Anyone have the volumes from the Moscow ICC congress in 1975. I do not know what volume, pagination, or even the exact year! of Richard Leary's publication, but this is the citation information I have:
Leary, 1979??. Namurian paleogeography of the western margin of the Eastern Interior (Illinois) Basin. Compte Rendu 8th International Congress on Stratigraphy and Geology of the Carboniferous, Moscow, 1975. Seems to be on around page 49 or so, and may or may not have associated plates/figures.
Maybe the climatic models are misleading, the tectonic models wrong, and the floras not comparable.
I am preparing an exhibit of science dissemination about Real vs Teddy bears cultural aspects. The possibility of a bear cult (highly controversial as I suspect among palaeontologists) has to be treated in such an exhibit, and I would like to say only what science allows me to say...
Have actual brown bear, polar bear, grizzly bear or older cave bear "godness" status been demonstrated in some human cultures ?
Thank you very much in advance...
Paleomagnetists frequently discarded site mean_directions whose its alpha_95 greater than e.g 20 degrees in order to get a mean_locality direction; is it possible to do it without removing the directions ? For example, by introducing weigth to each component (e.g. proportional to 1/ (alpha_95). This is usually done in ordinary statistics.
Large percent of Late Paleoindian points have asymmetrical bases and beveled blades. The site is in west Louisiana. It is located on the upland/bottomland interface overlooking a small stream with a wide floodplain abundant in hardwood and palmetto. Has been suggested that the basal edges are shaped to strengthen their hafting for the task the points/knives were used for, possibly plant processing (see photo).
Jurassic deposits of the Siberia and NE Russia are characterized by numerous glendonite occurences, especially widely distributed in Upper Pliensbachian and Bajocian-Bathonian. Did anybody know any information about the coeval glendonite occurrences in Northern America? I know only two briefly mentioned records of "stellate nodules" in the Kimmeridgian of Northern Yukon and Mid Volgian of Prince Patrick Island
A core in lagoonal sediment have been analyzed, S curve show a interesting variability, It could be related to anoxic phase, the macro-fauna has been identified too. I would like to know is there is a limit in the S content of the sediment or more wisely, a way to determine anoxic crisis in sediment.
Thanks in advance for your replies.
Now I'm working on manuscript dedicating to fossil fish fauna from the late Paleocene - early Eocene deposits. Fish prints are located at the surface of lake sapropelites. Plaese, let me know, which sedimentation rate is average for these sediments in lake environment (n meters per ...)? The total thickness of sapropelites is near 300-350 m.
The trace fossil was found in lower - upper Turonian Deban Fulani member of Pindiga Formation, Gongola Basin Upper Benue Trough, Northeastern Nigeria.
I would like to get age constraints on the deposition of fluvial sediments in a river deposit in the Kenya Rift. Age estimates are Mid to Late Pleistocene. The sources are mostly basaltic, trachytic and phonolitic lava flows. Quarz content is fairly low, so I'm guessing OSL won't be the method of choice. Any ideas?
The object (more objects) was found in the examination of of calcareous nannofossils in the Lower - Middle Jurassic sediments. It can be a part of the nannoplankton body. Thank you for your help :-)
I infer that there probably existed a passage between the Tibetan Plateau and the Qinling Mountains during the Late Miocene based a lot of tectonic and climatic records. Development of the passage was mainly controlled by the eastward expansion of the Tibetan Plateau, which constrained rainfall transported by the Asian summer monsoon to flow into interior China. I need a modeler help me to test this hypothesis? Please contact me for specific information
The late Prof. Dr. Antonio de Barros Machado, Director of the Dundo Museum of Zoology and Anthropology in Angola (1947-1974) studied during more than 30 years of intense work (until 2003 in Portugal, Oeiras) a great number of laterite and bauxite rock samples, in his opinion molded by termite activity in geologic times. He analyzed laterite and bauxite rocks from many places on Earth. His results were only partially recognized because they put into question the "sedimentary origin" of theses formations. I have been dealing with his heritage and am ready to bridge important data for interested colleagues. Grasset mentions in his double volumed encyclopedia part, dedicated to termites, that he never had met more convincing arguments as to the origin of these rocks then those of Barros Machado, though in his first approach, documented in the earlier Zoology encyclopedia, he was not yet convinced, but then surrendered to the smashing amount of proof, proposed by Barros Machado.
In the collection of private letters, there were more geology scientists to accept this innovating idea, but it still remains controverse.
I need advice, explanations, articles, journals, textbooks etc. on the application of stable and trace element(unstable) isotopes and rare earth element studies on deciphering the genesis paleoenvironment and paleoclimate of ironstone deposits.
Hello every body.
First of all, season greetings !!!
I have been on a Christmas market and I have seen these “weird” fossils, I mean the central ones. They are circular with a central structure (helicoidal?). I am a Tertiary guy and I am not a specialist of Paleozoic fossils. The seller tells that are jellyfishes. For me it looks pretty much as a not well-preserved Ediacaran Tribrachidium. The sediment where it is preserved is sandstone. However, I know a little the area where it has been discovered. Confirmed by the seller, this is Devonian.
Is it a jellyfish ? Is there still Ediacaran fauna during the Devonian ?
Thank you very much for your answer and Happy new year.
In the bivalve classification of Bieler et al. (2010), they list Limida Moore, 1952. This is not in their reference list, but there is a Moore et al. (1952) "Invertebrate Fossils". I've had a look at the book and I don't think this is the reference they meant for Limida. I cannot find an alternative "Moore 1952", that Bieler et al. may have accidentally omitted, anywhere.
In a recent paper (>5-6 years ago), I remember seeing a paleogeographic reconstruction of South America (it looked something like the attached link, but for South America) during the period it was isolated from other land masses (either the Eocene, Oligocene, or Miocene). However, when I went to try to find the figure again, I could not locate it. All of the paleogeographic maps of South America I have seen either focus on the northwestern corner of the continent or Patagonia. I was wondering if anyone knew of any papers that had presented similar maps of South America during this time period.
The cores that were drilled provide quartz crystals with linear features indicating shock metamorphism but still not much was found around the crater itself. It is surrounded with granitic rock that in some parts are very potassic
I want to ask if anyone knows any structures from the fossil record that could be considered as hailstone impression. We have already published some from the Neoproterozoic/Cambrian transition and simply looking for other examples. They could tell a lot about the early atmosphere it dynamics and climate zone distribution.
Thanks for any respond.
Environmental magnetic methods including magnetic susceptibility have been used in paleoclimate research. Researchers have also found that magnetic susceptibility is a proxy to study the paleo-rainfall conditions. Sedimentologists have recognized that flood and drought conditions are based on down core profiles of environmental magnetic properties. Unlike polar regions, tropical and sub-tropical countries have completely different depositional trends of magnetic minerals in sediments. Thus, compared to other methods, are environmental magnetic methods a reliable tool to study the paleo-monsoon conditions?