Joseph D Ortiz
Dados Biográficos
| ID | 4425265 |
|---|---|
| NOME | Joseph D Ortiz |
| PRENOMES | Joseph D |
| SOBRENOME | Ortiz |
| ASSINATURA | ORTIZ J D |
| AFILIAÇÕES | Kent State University |
| ORCID | 0000-0002-6583-3850 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 13 |
| TOTAL DE CITAÇÕES | 14 |
| TOTAL COMO AUTOR | 13 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1997 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2025 |
| ÍNDICE H | 3 |
What can lithics tell us about hominin technology's ‘primordial soup’? An origin of stone knapping via the emulation of Mother Nature
The use of stone hammers to produce sharp stone flakes—knapping—is thought to represent a significant stage in hominin technological evolution because it facilitated the exploitation of novel resources, including meat obtained from medium‐to‐large‐sized vertebrates. The invention of knapping may have occurred via an additive (i.e., cumulative) process that combined several innovative stages. Here, we propose that one of these stages was the homin…
Hit or miss
Stone weapon tips can exhibit microscopic linear impact traces (MLITs), as a result of the tip impacting abrasive materials, including stone fragments from the tip itself that detached upon impact. Experiments have demonstrated that MLITs can form via the use of a variety of weapon systems, stone point types, and targets. MLITs found on North American Late Pleistocene Clovis points in association with proboscideans at the Colby and Lange/Ferguson…
Examining the distribution of Middle Paleolithic Nubian cores relative to chert quality in southern (Nejd, Dhofar) and south‐central (Duqm, Al Wusta) Oman
Lithic raw material properties are often invoked to explain the presence, absence, form, or ontogeny of Paleolithic stone tools. Here, we explore whether the frequency of the Middle Paleolithic Nubian core form and core‐reduction systems co‐varies with toolstone quality in two neighboring regions in Oman: the southern region of Nejd, Dhofar, and the south‐central region of Duqm, Al Wusta. Specifically, we predicted that if raw material difference…
Understanding Eunice Foote's 1856 experiments
The contribution of Eunice Foote (1819–1888) to early understanding of the relationship between atmospheric gases and climate change has become a focus of interest in the scholarly community and more widely on social media. In this article we offer a detailed interpretation of both of her known published papers, focusing particularly on her first and most significant paper of 1856, in which she related changes in the types and amounts of atmosphe…
Using visible derivative spectroscopy to assess flaked projectile point provenance
Linking the stone raw material of a lithic artifact to its original outcrop is an important endeavor that facilitates archaeologists' understanding of prehistoric mobility, trade, economics, and land use. Based on macroscopic identification, archaeologists' presume that prehistoric Holocene occupants of the Welling Site, Ohio, made use of the locally available Upper Mercer chert for the majority of their projectile points. Here we apply visible d…
Reconstruction of late Quaternary paleohydrologic Conditions in southeastern British Columbia using visible derivative spectroscopy of Cleland Lake Sediment
Visible derivative spectroscopy (VDS) analysis of sediment from Cleland Lake, Southeastern British Columbia provides a reconstruction of paleolimnological productivity and hydrologic change during the past 14,000 calibrated 14 C years before present (cal yr BP). The first five principal components (PC) of the VDS data explain 97% of the variance in the VDS data set. Four PCs correlate with standard reflectance derivative spectra for diatom, dinof…
Preliminary findings from Lake sediment studies of changing water availability in Western North America during the Holocene
Closed Lake oxygen isotope records of drought in the Pacific Northwest Spanning the common era
Year cycle dominated Holocene dynamics of the Yellow River delta, China
The world’s mega-deltas are extremely important from a human perspective and attract considerable effort to reveal their evolution, growth-related driving forces, and human impacts. Here, we report a case study on the Holocene deltaic evolution of the Yellow River, through development of a conceptual model, which is compared with paleo-proxy to analyze the forcing acting on the delta. The main conclusion is that superlobe switching was modulated …
Mid- to late-Holocene Indian winter monsoon variability from a terrestrial record in eastern and southeastern coastal environments of Sri Lanka
The southeastern coastal plain of Sri Lanka contains Holocene sediment archives representing the winter monsoon variability because this region is protected from both summer monsoon and cyclonic rainfall. Chemical, biological, mineralogical, and physical climate proxies were studied in sediment cores extracted from three different coastal estuaries and lagoons situated on the southeastern coast to derive winter monsoon variability. These cores di…
Abrupt onset and termination of the African Humid Period
Coherent High- and Low-Latitude Climate Variability During the Holocene Warm Period
A faunal record of sea-surface temperature (SST) variations off West Africa documents a series of abrupt, millennial-scale cooling events, which punctuated the Holocene warm period. These events evidently resulted from increased southward advection of cooler temperate or subpolar waters to this subtropical location or from enhanced regional upwelling. The most recent of these events was the Little Ice Age, which occurred between 1300 to 1850 A.D.…
Export growth and development in poor rural regions
Mid- to late-Holocene Indian winter monsoon variability from a terrestrial record in eastern and southeastern coastal environments of Sri Lanka
The southeastern coastal plain of Sri Lanka contains Holocene sediment archives representing the winter monsoon variability because this region is protected from both summer monsoon and cyclonic rainfall. Chemical, biological, mineralogical, and physical climate proxies were studied in sediment cores extracted from three different coastal estuaries and lagoons situated on the southeastern coast to derive winter monsoon variability. These cores di…
Export growth and development in poor rural regions
Examining the distribution of Middle Paleolithic Nubian cores relative to chert quality in southern (Nejd, Dhofar) and south‐central (Duqm, Al Wusta) Oman
Lithic raw material properties are often invoked to explain the presence, absence, form, or ontogeny of Paleolithic stone tools. Here, we explore whether the frequency of the Middle Paleolithic Nubian core form and core‐reduction systems co‐varies with toolstone quality in two neighboring regions in Oman: the southern region of Nejd, Dhofar, and the south‐central region of Duqm, Al Wusta. Specifically, we predicted that if raw material difference…
Hit or miss
Stone weapon tips can exhibit microscopic linear impact traces (MLITs), as a result of the tip impacting abrasive materials, including stone fragments from the tip itself that detached upon impact. Experiments have demonstrated that MLITs can form via the use of a variety of weapon systems, stone point types, and targets. MLITs found on North American Late Pleistocene Clovis points in association with proboscideans at the Colby and Lange/Ferguson…
Year cycle dominated Holocene dynamics of the Yellow River delta, China
The world’s mega-deltas are extremely important from a human perspective and attract considerable effort to reveal their evolution, growth-related driving forces, and human impacts. Here, we report a case study on the Holocene deltaic evolution of the Yellow River, through development of a conceptual model, which is compared with paleo-proxy to analyze the forcing acting on the delta. The main conclusion is that superlobe switching was modulated …
Export growth and development in poor rural regions
Abrupt onset and termination of the African Humid Period
Coherent High- and Low-Latitude Climate Variability During the Holocene Warm Period
A faunal record of sea-surface temperature (SST) variations off West Africa documents a series of abrupt, millennial-scale cooling events, which punctuated the Holocene warm period. These events evidently resulted from increased southward advection of cooler temperate or subpolar waters to this subtropical location or from enhanced regional upwelling. The most recent of these events was the Little Ice Age, which occurred between 1300 to 1850 A.D.…
Mid- to late-Holocene Indian winter monsoon variability from a terrestrial record in eastern and southeastern coastal environments of Sri Lanka
The southeastern coastal plain of Sri Lanka contains Holocene sediment archives representing the winter monsoon variability because this region is protected from both summer monsoon and cyclonic rainfall. Chemical, biological, mineralogical, and physical climate proxies were studied in sediment cores extracted from three different coastal estuaries and lagoons situated on the southeastern coast to derive winter monsoon variability. These cores di…
Reconstruction of late Quaternary paleohydrologic Conditions in southeastern British Columbia using visible derivative spectroscopy of Cleland Lake Sediment
Visible derivative spectroscopy (VDS) analysis of sediment from Cleland Lake, Southeastern British Columbia provides a reconstruction of paleolimnological productivity and hydrologic change during the past 14,000 calibrated 14 C years before present (cal yr BP). The first five principal components (PC) of the VDS data explain 97% of the variance in the VDS data set. Four PCs correlate with standard reflectance derivative spectra for diatom, dinof…
Preliminary findings from Lake sediment studies of changing water availability in Western North America during the Holocene
Closed Lake oxygen isotope records of drought in the Pacific Northwest Spanning the common era
Year cycle dominated Holocene dynamics of the Yellow River delta, China
The world’s mega-deltas are extremely important from a human perspective and attract considerable effort to reveal their evolution, growth-related driving forces, and human impacts. Here, we report a case study on the Holocene deltaic evolution of the Yellow River, through development of a conceptual model, which is compared with paleo-proxy to analyze the forcing acting on the delta. The main conclusion is that superlobe switching was modulated …
Understanding Eunice Foote's 1856 experiments
The contribution of Eunice Foote (1819–1888) to early understanding of the relationship between atmospheric gases and climate change has become a focus of interest in the scholarly community and more widely on social media. In this article we offer a detailed interpretation of both of her known published papers, focusing particularly on her first and most significant paper of 1856, in which she related changes in the types and amounts of atmosphe…
Using visible derivative spectroscopy to assess flaked projectile point provenance
Linking the stone raw material of a lithic artifact to its original outcrop is an important endeavor that facilitates archaeologists' understanding of prehistoric mobility, trade, economics, and land use. Based on macroscopic identification, archaeologists' presume that prehistoric Holocene occupants of the Welling Site, Ohio, made use of the locally available Upper Mercer chert for the majority of their projectile points. Here we apply visible d…
Hit or miss
Stone weapon tips can exhibit microscopic linear impact traces (MLITs), as a result of the tip impacting abrasive materials, including stone fragments from the tip itself that detached upon impact. Experiments have demonstrated that MLITs can form via the use of a variety of weapon systems, stone point types, and targets. MLITs found on North American Late Pleistocene Clovis points in association with proboscideans at the Colby and Lange/Ferguson…
Examining the distribution of Middle Paleolithic Nubian cores relative to chert quality in southern (Nejd, Dhofar) and south‐central (Duqm, Al Wusta) Oman
Lithic raw material properties are often invoked to explain the presence, absence, form, or ontogeny of Paleolithic stone tools. Here, we explore whether the frequency of the Middle Paleolithic Nubian core form and core‐reduction systems co‐varies with toolstone quality in two neighboring regions in Oman: the southern region of Nejd, Dhofar, and the south‐central region of Duqm, Al Wusta. Specifically, we predicted that if raw material difference…
What can lithics tell us about hominin technology's ‘primordial soup’? An origin of stone knapping via the emulation of Mother Nature
The use of stone hammers to produce sharp stone flakes—knapping—is thought to represent a significant stage in hominin technological evolution because it facilitated the exploitation of novel resources, including meat obtained from medium‐to‐large‐sized vertebrates. The invention of knapping may have occurred via an additive (i.e., cumulative) process that combined several innovative stages. Here, we propose that one of these stages was the homin…
Geology (9 obras) · Geography (8 obras) · Geology and Paleoclimatology Research (8 obras) · Holocene (7 obras) · Climatology (6 obras) · Geology (6 obras) · Pleistocene-Era Hominins and Archaeology (6 obras) · Paleontology (5 obras) · Archaeology (4 obras) · Archaeology and ancient environmental studies (4 obras)