Jon Kalb | |
|---|---|
| Born | 17 August 1941 |
| Died | 27 October 2017 (aged 76) |
Jon Kalb August 17, 1941 (Houston, Texas) - October 27, 2017 (Austin, Texas) was a research geologist with the Vertebrate Paleontology Laboratory (Texas Memorial Museum), University of Texas at Austin. He received a pre-doctoral fellowship from the Carnegie Geophysical Laboratory in 1968, a graduate fellowship from Johns Hopkins University in 1969, and a BSc from American University in 1970. [1]
As a teenager Kalb began his career with a Mexican-American expedition searching for early shipwrecks off the coast of the Yucatan. [2] [ page needed ] He later joined famed treasure hunter and marine archeologist Bob Marx exploring reefs in the Caribbean. [3]
Sidelined by injuries from diving, Kalb was sent to the west coast of South America by the Smithsonian to collect marine fauna. [4] He then joined a team of geologists with the U.S. Army Corps of Engineers in northwest Colombia mapping a potential route for a sea-level canal, [5] which led him to prospect for gold on the Guinean Shield for the Guyana Geological Survey. [6] While at Johns Hopkins he became interested in the plate tectonics of the Afar Depression, a triple (rift) junction in northeastern Ethiopia. [7] [8] In 1971 he moved to Addis Ababa with his family and over the next seven years explored the Awash Valley in the central and western Afar.
Kalb was a founder of the International Afar Research Expedition that recovered the 3.2 million year old Lucy skeleton, [9] [10] [11] and later director of the Ethiopia-based mission that pioneered explorations in the Middle Awash, revealing some of the most prolific deposits bearing early hominin fossils and artifacts in the world. [12] [13] Discoveries included a nearly complete hyper-robust skull of a 600,000-year-old pre-Neanderthal; [14] and a 4.4 million-year-old fossil skeleton Ardipithecus found by Tim White. [15] From the Middle Awash site Kalb and Assefa Mebrate described the most complete known record of ancestral elephants (18 species) from a single area, [16] which fauna serve as an analog to other equally diverse faunal groups recovered from the region, including hominids and the earliest hominins. Scores of archeological localities were found, ranging in time from the late Pliocene with the earliest stone tools to late Pleistocene sites containing pottery. [17] [18] In a 2010 publication Kalb proposed that the land of Punt—a trading partner with ancient Egypt—was situated in the central Afar, a short trek from the Gulf of Tadjura. [19]
After Kalb established a model-training program for Ethiopian students, and the first paleobiology research laboratory in the country, he was expelled from Ethiopia in mid-1978 amid fabricated allegations he spied for the CIA. [20] In 1977 the U.S. National Science Foundation declined funds to Kalb's team based on these same charges, as revealed by documents he obtained under the Freedom of Information Act. [21] A year later he won a court stipulated settlement with NSF concluding that he was denied a fair hearing under the Privacy Act. [22] A year later he successfully petitioned NSF under the First Amendment to reform its peer review system. [23]
Following more trips to Africa—joining teams with the USGS, the Technical University of Berlin, and the University of Vienna—Kalb renewed surveys for Eocene mammals begun in the 1930s along the remote borderlands of West Texas. [24] Described as the “American Afar,” the region is hot, wild, and minced by faults of the Rio Grande rift with parallels to the “African Afar.” To date the area has produced over 4000 extinct mammals, including some of the last known primates in North America. [25]
Australopithecus afarensis is an extinct species of australopithecine which lived from about 3.9–2.9 million years ago (mya) in the Pliocene of East Africa. The first fossils were discovered in the 1930s, but major fossil finds would not take place until the 1970s. From 1972 to 1977, the International Afar Research Expedition—led by anthropologists Maurice Taieb, Donald Johanson and Yves Coppens—unearthed several hundreds of hominin specimens in Hadar, Ethiopia, the most significant being the exceedingly well-preserved skeleton AL 288-1 ("Lucy") and the site AL 333. Beginning in 1974, Mary Leakey led an expedition into Laetoli, Tanzania, and notably recovered fossil trackways. In 1978, the species was first described, but this was followed by arguments for splitting the wealth of specimens into different species given the wide range of variation which had been attributed to sexual dimorphism. A. afarensis probably descended from A. anamensis and is hypothesised to have given rise to Homo, though the latter is debated.
Hadar is a paleontological site in Mille district, Administrative Zone 1 of the Afar Region, Ethiopia, 15 km upstream (west) of the A1 road's bridge across the Awash River.
The Awash is a major river of Ethiopia. Its course is entirely contained within the boundaries of Ethiopia and empties into a chain of interconnected lakes that begin with Lake Gargori and end with Lake Abbe on the border with Djibouti, some 100 kilometres from the head of the Gulf of Tadjoura. It is the principal stream of an endorheic drainage basin covering parts of the Amhara, Oromia and Somali Regions, as well as the southern half of the Afar Region.
The Afar Triangle is a geological depression caused by the Afar Triple Junction, which is part of the Great Rift Valley in East Africa. The region has disclosed fossil specimens of the very earliest hominins; that is, the earliest of the human clade, and it is thought by some paleontologists to be the cradle of the evolution of humans. The Depression overlaps the borders of Eritrea, Djibouti and the entire Afar Region of Ethiopia; and it contains the lowest point in Africa, Lake Assal, Djibouti, at 155 m (509 ft) below sea level.
Tim D. White is an American paleoanthropologist and Professor of Integrative Biology at the University of California, Berkeley. He is best known for leading the team which discovered Ardi, the type specimen of Ardipithecus ramidus, a 4.4 million-year-old likely human ancestor. Prior to that discovery, his early career was notable for his work on Lucy as Australopithecus afarensis with discoverer Donald Johanson.
The Middle Awash is a paleoanthropological research area in the Afar Region along the Awash River in Ethiopia's Afar Depression. It is a unique natural laboratory for the study of human origins and evolution and a number of fossils of the earliest hominins, particularly of the Australopithecines, as well as some of the oldest known Olduwan stone artifacts, have been found at the site—all of late Miocene, the Pliocene, and the very early Pleistocene times, that is, about 5.6 million years ago (mya) to 2.5 mya. It is broadly thought that the divergence of the lines of the earliest humans (hominins) and of chimpanzees (hominids) was completed near the beginning of that time range, or sometime between seven and five mya. However, the larger community of scientists provide several estimates for periods of divergence that imply a greater range for this event, see CHLCA: human-chimpanzee split.
Aramis is a village and archaeological site in north-eastern Ethiopia, where remains of Australopithecus and Ardipithecus have been found. The village is located in Administrative Zone 5 of the Afar Region, which is part of the Afar Sultanate of Dawe, with a latitude and longitude of 10°30′N40°30′E, and is part of the, Carri Rasuk, Xaale Faagê Daqaara.
Yohannes Haile-SelassieAmbaye is an Ethiopian paleoanthropologist. An authority on pre-Homo sapiens hominids, he particularly focuses his attention on the East African Rift and Middle Awash valleys. He was curator of Physical Anthropology at the Cleveland Museum of Natural History from 2002 until 2021, and now is serving as the director of the Arizona State University Institute of Human Origins. Since founding the institute in 1981, he has been the third director after Donald Johanson and William Kimbel.
The Dikika is an area of the Afar Region of Ethiopia where the hominin fossil named Selam was found. Dikika is located in Mille woreda.
Maurice Taieb was a French geologist and paleoanthropologist. He discovered the Hadar formation, recognized its potential importance to paleoanthropology and founded the International Afar Research Expedition (IARE). This enabled co-director Donald Johanson to discover an early hominin fossil, the 3.2-million-year-old Australopithecine Lucy in the Awash Valley of Ethiopia's Afar Depression.
Ardipithecus kadabba is the scientific classification given to fossil remains "known only from teeth and bits and pieces of skeletal bones", originally estimated to be 5.8 to 5.2 million years old, and later revised to 5.77 to 5.54 million years old. According to the first description, these fossils are close to the common ancestor of chimps and humans. Their development lines are estimated to have parted 6.5–5.5 million years ago. It has been described as a "probable chronospecies" of A. ramidus. Although originally considered a subspecies of A. ramidus, in 2004 anthropologists Yohannes Haile-Selassie, Gen Suwa, and Tim D. White published an article elevating A. kadabba to species level on the basis of newly discovered teeth from Ethiopia. These teeth show "primitive morphology and wear pattern" which demonstrate that A. kadabba is a distinct species from A. ramidus.
Ardipithecus ramidus is a species of australopithecine from the Afar region of Early Pliocene Ethiopia 4.4 million years ago (mya). A. ramidus, unlike modern hominids, has adaptations for both walking on two legs (bipedality) and life in the trees (arboreality). However, it would not have been as efficient at bipedality as humans, nor at arboreality as non-human great apes. Its discovery, along with Miocene apes, has reworked academic understanding of the chimpanzee-human last common ancestor from appearing much like modern day chimpanzees, orangutans and gorillas to being a creature without a modern anatomical cognate.
Loxodonta adaurora is an extinct species of elephant in the genus Loxodonta, that of the African elephants. Fossils of Loxodonta adaurora have only been found in Africa, where they developed in the Pliocene. L. adaurora was presumed to be the genetic antecedent of the two modern African elephant species; however, an analysis in 2009 suggested that L. africana evolved from L. atlantica. The same study concluded that Loxodonta adaurora was morphologically indistinguishable from Mammuthus subplanifrons and that these constituted the same species.
Loxodonta exoptata is an extinct species of elephant in the genus Loxodonta, from Africa. A 2009 study suggested that Loxodonta exoptata gave rise to L. atlantica, which gave rise to L. africana. The molars of L. exoptata are distinguished from later loxodonts by the lower plate number and their specialized enamel loops. Fossil remains of L. exoptata have been found at Pliocene sites in eastern Africa including Laetoli and Koobi Fora.
Stegodibelodon is an extinct genus of elephant or gomphothere from the Miocene.
The Middle Awash Project is an international research expedition conducted in the Afar region of Ethiopia with the goal of determining the origins of humanity. The project has the approval of the Ethiopian Culture Ministry and a strong commitment to developing Ethiopian archaeology, paleontology and geology research infrastructure. This project has discovered over 260 fossil specimens and over 17,000 vertebrate fossil specimens to date ranging from 200,000 to 6,000,000 years in age. Researchers have discovered the remains of four hominin species, the earliest subspecies of homo sapiens as well as stone tools. All specimens are permanently held at the National Museum of Ethiopia, where the project’s laboratory work is conducted year round.
Pliopapio is an extinct genus of Old World monkey known from the latest part of the Miocene to the early Pliocene Epochs from the Afar Region of Ethiopia. It was first described based on a very large series of fossils from the site of Aramis in the Middle Awash, which has been dated by 40Ar/39Ar to 4.4 million years old. It has since been found from similarly aged sediments at Gona, approximately 75 km to the North. Additional fossils from the Middle Awash extend its known time range back to at least 5.3 million years ago. There is only one known species, Pliopapio alemui.
Gona is an archaeological site in the Afar Triangle of Ethiopia located in the Ethiopian Lowlands. The site, near the Middle Awash and Hadar regions, is primarily known for paleoanthropological study, including excavations of Late Miocene and Early Pliocene fossils, as well as Oldowan and Acheulean stone tools. Evidence of Homo erectus presence at Gona dates back to as early as 1.8 million years ago, making Gona's stone tools some of the world's oldest stone tool artifacts found to date. Gona is also known as a key site for the study of human evolution, with a rich hominid fossil record that includes evidence of Ardipithecus remains dating to around 4.5 million years old and Homo erectus fossils from approximately 1.8 to 1.7 million years ago. Likewise, faunal remains such as cutmarked bones from Gona give insight into early hominid diets and butchery practices, making it an important site for zooarchaeology.
Homo bodoensis is the species name for extinct archaic humans that lived during the Chibanian in Africa. It relies on the fossil specimen known as Bodo cranium, which was discovered in 1976 from the Awash River in Ethiopia and is estimated to have lived around 500,000 years ago. Following the comparative analysis of the fossil with those of other Homo falling on the same geological age, the name was formally introduced in 2021.