Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Earth Sciences (1881)
- Environmental Sciences (697)
- Geology (494)
- Computer Sciences (435)
- Mathematics (429)
-
- Engineering (393)
- Chemistry (344)
- Arts and Humanities (285)
- Oceanography and Atmospheric Sciences and Meteorology (270)
- American Studies (234)
- Life Sciences (228)
- Education (223)
- Environmental Indicators and Impact Assessment (220)
- Social and Behavioral Sciences (214)
- Statistics and Probability (184)
- Physics (175)
- Other Oceanography and Atmospheric Sciences and Meteorology (146)
- Geochemistry (140)
- Geomorphology (138)
- Speleology (129)
- Medicine and Health Sciences (127)
- Hydrology (117)
- Science and Mathematics Education (114)
- Civil and Environmental Engineering (102)
- Water Resource Management (99)
- Sustainability (83)
- Artificial Intelligence and Robotics (80)
- Computer Engineering (76)
- Other Earth Sciences (70)
- Keyword
-
- Florida (64)
- Hillsborough Bay (63)
- Quantitative literacy (63)
- Seagrass (62)
- Water quality (57)
-
- Karst (56)
- Tampa Bay (55)
- Caulerpa prolifera (54)
- Nitrogen (54)
- Romania (54)
- Sediments (51)
- Environment (46)
- Sewage (42)
- Mathematics (41)
- Mud (41)
- Nutrient (41)
- Areal photo (40)
- Chlorophyll (40)
- Hooker's Point (40)
- Monitoring sites (40)
- Regulation (40)
- Seabed (40)
- Sewage treatment (40)
- Tampa Bay Area Study Group (40)
- Wastewater management (40)
- Assessment (37)
- Machine Learning (34)
- Numeracy (34)
- Quantitative reasoning (33)
- Speleogenesis (33)
- Publication Year
- Publication
-
- USF Tampa Graduate Theses and Dissertations (1834)
- International Journal of Speleology (909)
- School of Geosciences Faculty and Staff Publications (355)
- Studia UBB Geologia (211)
- Undergraduate Journal of Mathematical Modeling: One + Two (182)
-
- Numeracy (170)
- Reports (162)
- Sinkhole Conference 2015 (48)
- Geology Faculty Publications (39)
- Chemistry Faculty Publications (22)
- Data Sets (20)
- Images (20)
- The International Workshop on Ice Caves (18)
- National Cave and Karst Management Symposium 2013 (17)
- USF St. Petersburg Campus Faculty Publications (16)
- Military Cyber Affairs (15)
- Physics Faculty Publications (15)
- Mathematics and Statistics Faculty Publications (11)
- School of Geosciences Student Publications (11)
- FRONTIERS UNBOUND: Exploring Extreme Environments (9)
- University of South Florida (USF) M3 Publishing (8)
- Environmental Sustainability Oral Histories (6)
- Marine Science Faculty Publications (5)
- Department of Leadership, Policy, and Lifelong Learning (4)
- Suburban Sustainability (4)
- Textbooks Collection (4)
- Computer Science and Engineering Faculty Publications (3)
- Environmental Sustainability Books (3)
- Journal of Ecological Anthropology (3)
- Journal of Practitioner Research (3)
- Publication Type
- File Type
Articles 3601 - 3630 of 4144
Full-Text Articles in Physical Sciences and Mathematics
1995 File Geodatabase Containing Photo Point Locations, Aerial Photos, And Flight Maps, City Of Tampa Department Of Sanitary Sewers Bay Study Group, Pete Reehling, Richard Mckenzie
1995 File Geodatabase Containing Photo Point Locations, Aerial Photos, And Flight Maps, City Of Tampa Department Of Sanitary Sewers Bay Study Group, Pete Reehling, Richard Mckenzie
Data Sets
The Bay Study Group was created by the City of Tampa in 1976 to monitor the effects of pollution abatement that occurred in Hillsborough Bay when the city’s wastewater treatment plant was upgraded from primary to advanced treatment in 1979. The Bay Study Group documented a remarkable restoration of water quality parameters and biological indicators in Hillsborough Bay from the mid 1980s until 2009, when it was disbanded. This zip Geodatabase file contains the photo point locations, aerial photos, and flight maps for the year 1995.
Karst In Siliceous Rocks: The Speleothem Medium Of Finger Flutings And Its Isotopic Geochemistry, Robert G. Bednarik
Karst In Siliceous Rocks: The Speleothem Medium Of Finger Flutings And Its Isotopic Geochemistry, Robert G. Bednarik
International Journal of Speleology
The isotopic geochemistry relating to the re-precipitation of calcite in caves is considered, in terms of its theory, natural manifestations, and relationship with questions of radiometric dating of carbonate speleothems. Specific forms of’ such deposits are considered, together with the various modification processes they are subjected to. More specifically, particular forms of rock art found within, as well as on or under such deposits are examined, such as finger flutings commonly found in caves of Europe and Australia. Some of the variables relating to their occurrence are elucidated, their preservation and possible dating is reviewed in the light of these …
On Some Cave Minerals From Northern Norway, Bogdan Petroniu Onac, Stein-Erik Lauritzen
On Some Cave Minerals From Northern Norway, Bogdan Petroniu Onac, Stein-Erik Lauritzen
International Journal of Speleology
The present paper aims to point out the results of 31 samples from some Norwegian caves that have been analysed with respect to their mineralogical composition. Identification of the minerals was done by X-ray diffraction, thermal, infrared spectroscopy and scanning electron microscopy. Seventeen minerals were identified belonging to 4 groups: carbonates, sulphates, oxides-hydroxides and silicates.
Constraints On Present-Day Basin And Range Deformation From Space Geodesy, Timothy H. Dixon, Stefano Robaudo, Jeffrey Lee, Marith C. Reheis
Constraints On Present-Day Basin And Range Deformation From Space Geodesy, Timothy H. Dixon, Stefano Robaudo, Jeffrey Lee, Marith C. Reheis
School of Geosciences Faculty and Staff Publications
We use new space geodetic data from very long baseline interferometry and satellite laser ranging combined with other geodetic and geologic data to study contemporary deformation in the Basin and Range province of the western United States. Northwest motion of the central Sierra Nevada block relative to stable North America, a measure of integrated Basin and Range deformation, is 12.1±1.2 mm/yr oriented N38°W±5° (one standard error), in agreement with previous geological estimates within uncertainties. This velocity reflects both east-west extension concentrated in the eastern Basin and Range and north-northwest directed right lateral shear concentrated in the western Basin and Range. …
Gps Monitoring Data For Active Volcanos Available On Internet, Timothy H. Dixon, Frederic Farina, Ailin Mao, Frank Webb, Marcus Bursik, Ross Stein, Grant Marshall
Gps Monitoring Data For Active Volcanos Available On Internet, Timothy H. Dixon, Frederic Farina, Ailin Mao, Frank Webb, Marcus Bursik, Ross Stein, Grant Marshall
School of Geosciences Faculty and Staff Publications
Recent technological advances have now made it possible for volcanologists to continuously monitor active volcanoes with the Global Positioning System (GPS). These observations allow detection of large changes in surface strain near active volcanoes that may precede major volcanic eruptions by days, weeks or even months. They are therefore a critical component of programs designed to assess hazard and predict eruptions of active volcanoes.
Researchers who are unfamiliar with GPS technology or who do not have facilities to process large amounts of GPS data may have difficulty obtaining GPS results, however. To address this problem, we recently initiated a “proof …
Inflation Of Long Valley Caldera From One Year Of Continuous Gps Observations, Frank H. Webb, Marcus Bursik, Timothy H. Dixon, Frederic Farina, Grant Marshall, Ross S. Stein
Inflation Of Long Valley Caldera From One Year Of Continuous Gps Observations, Frank H. Webb, Marcus Bursik, Timothy H. Dixon, Frederic Farina, Grant Marshall, Ross S. Stein
School of Geosciences Faculty and Staff Publications
A permanent Global Positioning System receiver at Casa Diablo Hot Springs, Long Valley Caldera, California was installed in January, 1993, and has operated almost continuously since then. The data have been transmitted daily to the Jet Propulsion Laboratory for routine analysis with data from the Fiducial Laboratories for an International Natural sciences Network (FLINN) by the JPL FLINN analysis center. Results from these analyses have been used to interpret the on going deformation at Long Valley, with data excluded from periods when the antenna was covered under 2.5 meters of snow and from some periods when Anti Spoofing was enforced …
The 1993 Klamath Falls, Oregon, Earthquake Sequence: Source Mechanisms From Regional Data, Jochen Braunmiller, John Nábělek, Beate Leitner, Anthony Qamar
The 1993 Klamath Falls, Oregon, Earthquake Sequence: Source Mechanisms From Regional Data, Jochen Braunmiller, John Nábělek, Beate Leitner, Anthony Qamar
School of Geosciences Faculty and Staff Publications
We use regional broadband seismograms to obtain seismic moment-tensor solutions of the two September 20, 1993, Mw=6, Klamath Falls, Oregon earthquakes, their foreshock and largest aftershocks (MD>3.5). Several sub-groups with internally consistent solutions indicate activity on several fault segments and faults. From the estimated moment-tensors and depths of the main shocks and from the aftershock distribution we deduce that both main shocks occurred on an east-dipping normal fault, possibly related to the Lake of the Woods fault system. Rotation of T-axes between the two main shocks is consistent with the two dominant trends of the aftershocks …
Paleokarst Of The Bohemian Massif In The Czech Republic: An Overview And Synthesis, Pavel Bosàk
Paleokarst Of The Bohemian Massif In The Czech Republic: An Overview And Synthesis, Pavel Bosàk
International Journal of Speleology
Paleokarst of the Bohemian Massif on the territory of the Czech Republic developed as polygenetic and polycyclic forms with several phases of fossilization and rejuvenation depending on tectonic phases and deep chemical weathering. Paleotectonic period (pre-Permian in general) was characterized by evolution of relatively minor depositional and local paleokarsts. Neotectonic (platform) period (post-Permian) favoured the prolonged karst evolution of interregional paleokarst in two karst periods and several more or less distinctly separated karst phases.
The Classification Of Cave Minerals And Speleothems, Carol A. Hill, Paolo Forti
The Classification Of Cave Minerals And Speleothems, Carol A. Hill, Paolo Forti
International Journal of Speleology
The classification scheme of Hill and Forti, as used in the second edition of Cave Minerals of the World, is presented as a "practical" solution to the classification of cave minerals and speleothems. Classification and naming of cave minerals is by crystal class and follows nomenclature approved by the International Mineralogical Association. Classification of speleothems is based on morphology and whatever is known about origin, with division of speleothems into types, subtypes, and varieties. It is proposed that new speleothem types, subtypes, and names be approved by a UIS Commission of cave mineralogists.
1995 File Geodatabase Containing Aerial Photos, Pete Reehling, Richard Mckenzie, City Of Tampa Department Of Sanitary Sewers Bay Study Group
1995 File Geodatabase Containing Aerial Photos, Pete Reehling, Richard Mckenzie, City Of Tampa Department Of Sanitary Sewers Bay Study Group
Images
The Bay Study Group was created by the City of Tampa in 1976 to monitor the effects of pollution abatement that occurred in Hillsborough Bay when the city’s wastewater treatment plant was upgraded from primary to advanced treatment in 1979. The Bay Study Group documented a remarkable restoration of water quality parameters and biological indicators in Hillsborough Bay from the mid 1980s until 2009, when it was disbanded. This zip Geodatabase file contains the aerial photos for the year 1995.
Karst In Siliceous Rocks - Karst Landforms And Caves In The Auyàn-Tepui Massif (Est. Bolivar, Venezuela), Leonardo Piccini
Karst In Siliceous Rocks - Karst Landforms And Caves In The Auyàn-Tepui Massif (Est. Bolivar, Venezuela), Leonardo Piccini
International Journal of Speleology
During the expedition "Tepuy 93", six caves were explored in the precambrian quartzites of Roraima Group, in the Auyan-tepui massif. One of this caves reaches the depth of 370 m and a development of almost 3 km; its name is “Sima Auyan-tepui Noroeste” and it is currently the deepest cave in the world discovered in siliceous rocks The geological and morphological study of this cave has underlined again the importance of deep solutional weathering, along the network of fractures for the formation of caves in siliceous rocks. The different formation stages of the big superficial shafts, called “simas” were observed …
Second Interpretive Report Tampa Bypass Canal And Hillsborough River Hydro-Biological Monitoring Program Volume I Of Ii, Water And Air Research, Inc., Sol Environmental Services, Inc.
Second Interpretive Report Tampa Bypass Canal And Hillsborough River Hydro-Biological Monitoring Program Volume I Of Ii, Water And Air Research, Inc., Sol Environmental Services, Inc.
Reports
Water and Air Research, Inc. (WAR), is under contract to the WCRWSA to perform this three-year study on the southern reaches of the TBC and the HR in Hillsborough County, Florida. SDI Environmental Services, Inc. (SDI), is under contract to the WCRWSA to evaluate the existing hydrologic monitoring program for the TBC and the HR and develop and calibrate a groundwater/surface water flow model for that system. This second interpretive report includes an assessment of all biological and water-quality data collected during the first three years of the study. In addition, discussions of the hydrologic model and various water withdrawal …
Second Interpretive Report Tampa Bypass Canal And Hillsborough River Hydro-Biological Monitoring Program Volume Ii Of Ii, Water And Air Research, Inc., Sol Environmental Services, Inc.
Second Interpretive Report Tampa Bypass Canal And Hillsborough River Hydro-Biological Monitoring Program Volume Ii Of Ii, Water And Air Research, Inc., Sol Environmental Services, Inc.
Reports
Appendix A - W
Nutrient Bioassays In Tampa Bay, Dr. Vargo
Nutrient Bioassays In Tampa Bay, Dr. Vargo
Reports
Water samples were collected seasonally at four locations in Tampa Bay to determine if nitrogen, phosphorus and a chealtor (ETDA), alone or in combination, were limiting growth rate and/or biomass.
Ambient Surface Water Monitoring Report, Data Year January, 1992 - December, 1992 Pinellas County, Florida, Pinellas County Department Of Environmental Management-Water Resources Management Section, Donald Moores, Earl "Gene" Quinn, Pamela Leasure, Nancy Page, Mariben Anderson, Sean Coats, Susan Myers, Donald Hicks, Lisa Baltus
Ambient Surface Water Monitoring Report, Data Year January, 1992 - December, 1992 Pinellas County, Florida, Pinellas County Department Of Environmental Management-Water Resources Management Section, Donald Moores, Earl "Gene" Quinn, Pamela Leasure, Nancy Page, Mariben Anderson, Sean Coats, Susan Myers, Donald Hicks, Lisa Baltus
Reports
Whereas ambient surface water monitoring in Pinellas County had been limited and sporadic in the past, there has recently been a renewed interest in monitoring programs. Partly this has been encouraged by the activities of the National Estuary Program and the mandates of the federal NPDES Municipal Storm Sewer permitting program. In the case of Pinellas County, the County's Comprehensive Plan, adopted in 1989, mandated the implementation of ambient water quality monitoring in the waters of the County. The first annual report of monitoring results was published in December, 1992 (Moores, et. al., 1992).
This is the second annual report …
Results Of The City Of Tampa Surface Water Compliance Monitoring Program For The Year 1993 And Examination Of Long-Term Water Quality And Biological Indicator Trends In Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers
Results Of The City Of Tampa Surface Water Compliance Monitoring Program For The Year 1993 And Examination Of Long-Term Water Quality And Biological Indicator Trends In Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers
Reports
This report is submitted to Florida Department of Environmental Regulation (FDER) to satisfy the requirements set forth in specific condition No. 14 of Hookers Point WWTP permit No. D029-184532B. The report is based on data obtained by the City of Tampa (COT) compliance water quality monitoring program approved under construction permit DC29-152799 and the report also includes examination of long-term trends for water quality parameters and biological indicators collected by the City of Tampa Bay Study Group and the Environmental Protection Commission of Hillsborough County (EPC).
Sar Interferometry And Surface Change Detection, Timothy H. Dixon
Sar Interferometry And Surface Change Detection, Timothy H. Dixon
School of Geosciences Faculty and Staff Publications
Recent events have brought synthetic aperture radar (SAR) interferometry into vogue—at least in some sectors of the geophysical science community. For one thing, the image of coseismic displacement associated with the Landers earthquake, recently published in Nature [Massonnet et al., 1993], coupled with the recent disastrous Northridge earthquake of January 17,1994, has created interest in the Earth science community about SAR interferometry. In particular, there is widespread appreciation that this technique can make a significant contribution to earthquake studies in California and other technically active regions. Similarly, a recent demonstration that ice stream velocity could be measured directly …
Seagrass And Caulerpa Monitoring In Hillsborough Bay Fifth Annual Report, City Of Tampa Department Of Sanitary Sewers
Seagrass And Caulerpa Monitoring In Hillsborough Bay Fifth Annual Report, City Of Tampa Department Of Sanitary Sewers
Reports
This is the fourth annual report to FDER to satisfy the requirements set forth in specific condition #14 of FDER construction permit DO29-1845321B.
The City of Tampa, Bay Study Group (BSG), has monitored the effects of sewage pollution abatement in Hillsborough Bay since 1976. Within the last decade, water quality improvements and evidence of minor seagrass revegetation in Hillsborough Bay prompted the BSG to initiate a seagrass study to compliment other programs assessing the environmental status of Hillsborough Bay.
Aftershocks Of The 13 May 1993 Shumagin Alaska Earthquake, Zhong Ludwig, Max Wyss, Guy Tytgat, Stephen R. Mcnutt, Scott Stihler
Aftershocks Of The 13 May 1993 Shumagin Alaska Earthquake, Zhong Ludwig, Max Wyss, Guy Tytgat, Stephen R. Mcnutt, Scott Stihler
School of Geosciences Faculty and Staff Publications
The 13 May 1993 Ms 6.9 Shumagin earthquake had an aftershock sequence of 247 earthquakes with magnitudes greater than or equal to 1.5 by 1 June 1993. Of these aftershocks, 79 were located by using S-P travel times at the only two stations within 570 km of the mainshock epicenter. The rupture area inferred from the aftershocks is about 600 km2 and we estimate for the mainshock a mean fault displacement of 1.0 m and a 28 bar stress drop. The magnitude-frequency plots give a b-value for the aftershock sequence of about 0.4, which is low compared to …
Die Slowakischen Shauhöhlen Und Ihre Probleme, Ivan Racko
Die Slowakischen Shauhöhlen Und Ihre Probleme, Ivan Racko
International Journal of Speleology
In 1960 the Slovak Caves Administration, which managed twelve Slovak Caves was founded. It was controlled by the Ministry of Culture of the Slovak Socialist Republic and comprised also the Museum of Slovak Karst and the Slovak Speleological Society - a free speleological organisation. In 1981 such an Administration became part of the State Centre for the Protection of Nature. The main task of this centre was obviously the protection of nature in Slovakia but unfortunately many problems remained unsolved. The social movement in November 1989 accelerated the process to solve such problems and the Forum of Professional Workers of …
Kurzer Bericht Über Die Probleme Des Höhlentourismus In Jugoslawien, France Habe
Kurzer Bericht Über Die Probleme Des Höhlentourismus In Jugoslawien, France Habe
International Journal of Speleology
In the frame of the IUS, the activities concerning the Yugoslav show caves are reported and the most relevant problems are emphasized.
Problems Of Show Caves In Bohemia And Moravia, Milka Dusan
Problems Of Show Caves In Bohemia And Moravia, Milka Dusan
International Journal of Speleology
In the last years the show caves in Bohemia and Moravia were administrated by the Ministry of Culture with the status of a state assisted organization. That means that they were considered as those organizations not self-sufficient, without connections with tourism. Presently, the management of the show caves in Bohemia and Moravia is at a crossroad: to remain under the administration of the Ministry of Culture or move under the newly formed Ministry of Environment. In the latter case the cave management should change into a business organization similar to a private body. We believe that these problems can be …
Problemi Turistici Della Grotta Gigante Nel Carso Triestino, Fabio Forti
Problemi Turistici Della Grotta Gigante Nel Carso Triestino, Fabio Forti
International Journal of Speleology
The paper reports the tourist evolution of the Grotta Gigante (Giant Cave), near Trieste (Italy) during 80 years (1908 - 1989) of its opening to the public. At the beginning it entered in competition with some other local show caves, even much more famous (like Postojna and Stocjan), after the II World War on account of the change of the state boundaries it remained the sole show cave in that part of Italy. Then the Grotta Gigante succeeded, even if slowly, to cope with the changing tourist demands, improving more and more its facilities to follow the increasing tourist flows. …
Die Saalfelder Feengrotten: Ein Schaubergwerk Mit Höhlencharkter, Bernd Lochner
Die Saalfelder Feengrotten: Ein Schaubergwerk Mit Höhlencharkter, Bernd Lochner
International Journal of Speleology
The well known “Saalfelder Feengrotten” originated from an old aluminium mine called “Jeremiasglück”. The mine has been working from 1943 to 1945; the oldest formations have an age of about 350 years. Such formations were formed by an oxidation process which explains the rather fast growth rate in comparison to the growth rate of calcite formations. In the “Feengrotten” rare minerals can be found: the most common is a soft unstable compound, the diadochite (iron(III) phosphate). The control of the lampenflora is rather complicate and it is obtained with some compounds normally used in caves. The “Feengrotten” are visited yearly …
La Cueva De Nerja (Malaga, España), José Ramón Andérica Frias
La Cueva De Nerja (Malaga, España), José Ramón Andérica Frias
International Journal of Speleology
The history and the development of the cave of Nerja are here summarized. A short description of the cave with the main goals for the future are also reported.
Sinogammarus Troglodytes N. Gen. N. Sp. A New Troglobiont Gammarid From China (Crustacea Amphipoda), Gordon Karaman, Sandro Ruffo
Sinogammarus Troglodytes N. Gen. N. Sp. A New Troglobiont Gammarid From China (Crustacea Amphipoda), Gordon Karaman, Sandro Ruffo
International Journal of Speleology
The authors describe Sinogammarus troglodytes n. gen. n. sp. found in two caves in Sichuan province in China, the first Chinese troglobite of the Gammaridae family (sensu Barnard & Barnard, 1983; 1990). The new genus is discussed and compared with the microphthalmous and anophthalmous genera of Gammaridae, heretofore known in the subterranean waters of the Balkan peninsula and the Caucasus region. The genus Sinogammarus is most closely allied to Gammarus Fabricius and Anopogammarus Derzhavin.
Management Of Some Unusual Features In The Show Caves Of The United States, Jeanne Gurnee
Management Of Some Unusual Features In The Show Caves Of The United States, Jeanne Gurnee
International Journal of Speleology
Protection of the unusual features in some of the 200 show caves of the U.S. have required innovative management. The sea caves of both the east and west coasts present the need for special preservation methods. Throughout the nation sometimes glass enclosures, vehicles and boats are used to separate visitors from sensitive cave features. Lighting and cleaning techniques have been studied and altered to discourage growth of algae. Some show caves are protected by double glass entrance and exit doors. Many caves, particularly on public lands, are closed during the hibernation period of endangered bats. In a number of caves, …
Descrizione Morfologica E Stima Dell'impatto Ambientale Derivante Dall'apertura Al Pubblico Delle Grotte Di "Is Zuddas" Presso Santadi (Nuoro, Sardegna, Italia), Roberto Curreli, Nicolino Diana, Antonello Floris, Antonello Sulas
Descrizione Morfologica E Stima Dell'impatto Ambientale Derivante Dall'apertura Al Pubblico Delle Grotte Di "Is Zuddas" Presso Santadi (Nuoro, Sardegna, Italia), Roberto Curreli, Nicolino Diana, Antonello Floris, Antonello Sulas
International Journal of Speleology
After a short history of the discovery of the caves of “Is Zuddas” a geological description of the region and the geomorphological evolution of the cave are recorded. The results of a preliminary climatological research are reported and a rough evaluation of the visitors capacity is also given.
230Th Dating Of The Speleothems From The "Grotta Del Fiume-Grotta Grande Del Vento" Karst System In Frasassi (Ancona, Italy) And Paleoenvironmental Implications, Adriano Taddeucci, Paola Tuccimei, Mario Voltaggio
230Th Dating Of The Speleothems From The "Grotta Del Fiume-Grotta Grande Del Vento" Karst System In Frasassi (Ancona, Italy) And Paleoenvironmental Implications, Adriano Taddeucci, Paola Tuccimei, Mario Voltaggio
International Journal of Speleology
Chronological measurements have been carried out on speleothems from the Grotta del Fiume-Grotta Grande del Vento karst system in Frasassi (Ancona, Italy) by means of the 230Th radiometric method in order to date hypogean karst levels and related geological events. Higher levels were found to be older than the lower ones according to standstills and sinkings of the water table. The dated speleothems from the first and second level formed less than 10,000 years ago; the minimum ages of the third and fifth levels, which are respectively 130,000 and 200,000 years old, were correlated to climatic events. Dating different …
A New Species Of Troglobius (Collembola, Paronellidae) From Brazil, José G. Palacios-Vargas, Douglas Zeppelini
A New Species Of Troglobius (Collembola, Paronellidae) From Brazil, José G. Palacios-Vargas, Douglas Zeppelini
International Journal of Speleology
Troglobius brasiliensis n. sp. from two caves of Brazil is described and illustrated.