Malapa is a fossil-bearing cave located about northeast of the well known
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...
n
hominid
The Hominidae (), whose members are known as the great apes or hominids (), are a taxonomic family of primates that includes eight extant species in four genera: '' Pongo'' (the Bornean, Sumatran and Tapanuli orangutan); ''Gorilla'' (the east ...
-bearing sites of
Sterkfontein and
Swartkrans
Swartkrans is a fossil-bearing cave designated as a South African National Heritage Site, located about from Johannesburg. It is located in the Cradle of Humankind World Heritage Site and is notable for being extremely rich in archaeological m ...
and about north-northwest of
Johannesburg
Johannesburg ( , , ; Zulu and xh, eGoli ), colloquially known as Jozi, Joburg, or "The City of Gold", is the largest city in South Africa, classified as a megacity, and is one of the 100 largest urban areas in the world. According to Demo ...
, South Africa. It is situated within the
Cradle of Humankind World Heritage Site
A World Heritage Site is a landmark or area with legal protection by an international convention administered by the United Nations Educational, Scientific and Cultural Organization (UNESCO). World Heritage Sites are designated by UNESCO for h ...
.
History of investigations
In March 2008,
Lee Berger of the
University of the Witwatersrand
The University of the Witwatersrand, Johannesburg (), is a multi-campus South African Public university, public research university situated in the northern areas of central Johannesburg. It is more commonly known as Wits University or Wits ( o ...
, South Africa, undertook an exploration project in the Cradle of Humankind World Heritage site outside of Johannesburg, in order to map the known caves identified by him and his colleagues over the past several decades, and to place known fossil sites onto
Google Earth
Google Earth is a computer program that renders a 3D computer graphics, 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposition, superimposing satellite images, aerial photography, and geog ...
so that information could be shared with colleagues.
The area is important as nearly a third of the entire evidence for human origins in Africa comes from just a few sites in this region, and the region is arguably one of the most explored areas in Africa for evidence of human origins, having been investigated continuously since the first discoveries were made there in 1935.
At the beginning of this project, there were approximately 130 known cave sites in the region and around twenty fossil deposits.
By July 2008, the pattern of cave distribution seen on Google Earth by Berger as well as the recognition of what these deposits looked like from satellites and significant amounts of searching on the ground had led Berger to discover almost 500 caves that scientists had not plotted or identified previously.
Included in this were more than 25 fossil sites that had been unknown to science, all in probably the most explored region in Africa. Berger brought in geologist Paul Dirks, at that time Head of the School of GeoSciences at the University of the Witwatersrand, to lead the geological aspects of this exploratory project.
In late July, Berger noted in Google Earth a series of caves running along a fault that pointed to a blank area in the region, an area that appeared to have clusters of trees that typically marked cave deposits.
On 1 August he dropped off Dirks to map the recognized cave system and proceeded into the uninvestigated area with his dog Tau, a
Rhodesian Ridgeback
The Rhodesian Ridgeback is a large dog breed bred in the Southern Africa region. Its forebears can be traced to the semi-domesticated ridged hunting and guardian dogs of the Khoikhoi. These were interbred with European dogs by the early colonist ...
who accompanied him on almost all his explorations.
Almost immediately he discovered a rich fossil site that was unknown to science, in the vicinity of more than three dozen caves that had been apparently unrecognized by previous researchers.
![The Malapa valley](https://upload.wikimedia.org/wikipedia/commons/a/a4/The_Malapa_valley.jpg)
On 15 August, Berger returned to the site with his post-doctoral student, Dr. Job Kibii, and Berger's 9-year-old son
Matthew
Matthew may refer to:
* Matthew (given name)
* Matthew (surname)
* ''Matthew'' (ship), the replica of the ship sailed by John Cabot in 1497
* ''Matthew'' (album), a 2000 album by rapper Kool Keith
* Matthew (elm cultivar), a cultivar of the Ch ...
. Within minutes,
Matthew Berger
Lee Rogers Berger (born December 22, 1965) is an American-born South African paleoanthropologist and National Geographic Explorer-in-Residence. He is best known for his discovery of the ''Australopithecus sediba'' type site, Malapa; his leaders ...
had discovered the first remains of early human ancestors - a
clavicle
The clavicle, or collarbone, is a slender, S-shaped long bone approximately 6 inches (15 cm) long that serves as a strut between the shoulder blade and the sternum (breastbone). There are two clavicles, one on the left and one on the rig ...
, or collar bone. On the opposite side of the block, Berger quickly discovered a jawbone with a canine tooth of a
hominid
The Hominidae (), whose members are known as the great apes or hominids (), are a taxonomic family of primates that includes eight extant species in four genera: '' Pongo'' (the Bornean, Sumatran and Tapanuli orangutan); ''Gorilla'' (the east ...
. The find was later identified as part of a partial skeleton of a juvenile hominid, around 9 – 13 years of age.
On 4 September 2008, Berger returned to the site with more than a dozen colleagues, where Berger discovered a second partial skeleton of an adult female.
Recovered fossils
The site has produced arguably one of the most complete assemblages of early human ancestors ever found, including the most complete skeletons of early hominids yet discovered, and by far the most complete remains of any hominid dating to around 2 million years ago.
Over 200 elements have been recovered to date.
The partial skeletons are initially described in two papers in the journal ''
Science
Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
Science may be as old as the human species, and some of the earliest archeological evidence for ...
'' by Berger and colleagues as a new species of early human ancestor called ''
Australopithecus sediba
''Australopithecus sediba'' is an extinct species of australopithecine recovered from Malapa Cave, Cradle of Humankind, South Africa. It is known from a partial juvenile skeleton, the holotype MH1, and a partial adult female skeleton, the para ...
'' (sediba meaning natural spring or well in Sotho).
In addition to the fossils revealed initially, rocks collected from the site have been examined with
CT scans and contain even more bones, suggesting that the type specimen, Karabo, will become even more complete.
The species is suggested by the authors to be a good candidate for being the transitional species between the southern African ape-man ''
Australopithecus africanus
''Australopithecus africanus'' is an extinct species of australopithecine which lived between about 3.3 and 2.1 million years ago in the Late Pliocene to Early Pleistocene of South Africa. The species has been recovered from Taung, Sterkfonte ...
'' (the
Taung
Taung is a small town situated in the North West Province of South Africa. The name means ''place of the lion'' and was named after Tau, the King of the Barolong. ''Tau'' is the Tswana word for lion.
Education
High,Secondary and Middle Schools ...
Child,
Mrs. Ples
__NOTOC__
Mrs. Ples is the popular nickname for the most complete skull of an ''Australopithecus africanus'' ever found in South Africa. Many ''Australopithecus'' fossils have been found near Sterkfontein, about northwest of Johannesburg, in a r ...
) and either ''
Homo habilis
''Homo habilis'' ("handy man") is an extinct species of archaic human from the Early Pleistocene of East and South Africa about 2.31 million years ago to 1.65 million years ago (mya). Upon species description in 1964, ''H. habilis'' was highly ...
'' or even a direct ancestor of ''
Homo erectus
''Homo erectus'' (; meaning "upright man") is an extinct species of archaic human from the Pleistocene, with its earliest occurrence about 2 million years ago. Several human species, such as '' H. heidelbergensis'' and '' H. antecessor' ...
'' (
Turkana boy
Turkana Boy, also called Nariokotome Boy, is the name given to fossil KNM-WT 15000, a nearly complete skeleton of a ''Homo ergaster'' youth who lived 1.5 to 1.6 million years ago. This specimen is the most complete early hominin skeleton ever ...
,
Java man
Java Man (''Homo erectus erectus'', formerly also ''Anthropopithecus erectus'', ''Pithecanthropus erectus'') is an early human fossil discovered in 1891 and 1892 on the island of Java (Dutch East Indies, now part of Indonesia). Estimated to be ...
,
Peking man
Peking Man (''Homo erectus pekinensis'') is a subspecies of ''Homo erectus, H. erectus'' which inhabited the Zhoukoudian Cave of northern China during the Middle Pleistocene. The first fossil, a tooth, was discovered in 1921, and the Zhoukoudi ...
).
The species has long arms, like an
ape
Apes (collectively Hominoidea ) are a clade of Old World simians native to sub-Saharan Africa and Southeast Asia (though they were more widespread in Africa, most of Asia, and as well as Europe in prehistory), which together with its sister g ...
, short powerful hands, a very advanced
pelvis
The pelvis (plural pelves or pelvises) is the lower part of the trunk, between the abdomen and the thighs (sometimes also called pelvic region), together with its embedded skeleton (sometimes also called bony pelvis, or pelvic skeleton).
The ...
, and long legs capable of striding and possibly running like a human.
The skeletons were found among the articulated skeletons of a sabre-toothed cat,
antelope
The term antelope is used to refer to many species of even-toed ruminant that are indigenous to various regions in Africa and Eurasia.
Antelope comprise a wastebasket taxon defined as any of numerous Old World grazing and browsing hoofed mammals ...
s and even
mice
A mouse ( : mice) is a small rodent. Characteristically, mice are known to have a pointed snout, small rounded ears, a body-length scaly tail, and a high breeding rate. The best known mouse species is the common house mouse (''Mus musculus' ...
and
hare
Hares and jackrabbits are mammals belonging to the genus ''Lepus''. They are herbivores, and live solitarily or in pairs. They nest in slight depressions called forms, and their young are able to fend for themselves shortly after birth. The ge ...
s.
Geology
The fossils are preserved in a hard, concrete-like substance known as calcified
clastic sediments that formed at the bottom of what appears to be a shallow underground lake or pool that was possibly as much as underground at the time.
It is not known how these skeletons came to be in this pool, but it appears that they may have taken a significant fall.
No
carnivore
A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose food and energy requirements derive from animal tissues (mainly muscle, fat and other sof ...
s or
scavenger
Scavengers are animals that consume dead organisms that have died from causes other than predation or have been killed by other predators. While scavenging generally refers to carnivores feeding on carrion, it is also a herbivorous feeding b ...
s reached their bodies.
Age of the deposits
The fossil was dated using a combination of
paleomagnetism
Paleomagnetism (or palaeomagnetismsee ), is the study of magnetic fields recorded in rocks, sediment, or archeological materials. Geophysicists who specialize in paleomagnetism are called ''paleomagnetists.''
Certain magnetic minerals in rock ...
and
uranium-lead (U-Pb) dating by Andy Herries (
La Trobe University
La Trobe University is a public research university based in Melbourne, Victoria, Australia. Its main campus is located in the suburb of Bundoora. The university was established in 1964, becoming the third university in the state of Victoria an ...
, Australia), Robyn Pickering (
University of Melbourne
The University of Melbourne is a public research university located in Melbourne, Australia. Founded in 1853, it is Australia's second oldest university and the oldest in Victoria. Its main campus is located in Parkville, an inner suburb nor ...
, Australia) and Jan Kramers (
University of Johannesburg
The University of Johannesburg (UJ) is a public university located in Johannesburg, South Africa. The University of Johannesburg came into existence on 1 January 2005 as the result of a merger between the Rand Afrikaans University (RAU), the Te ...
, South Africa). U-Pb dating of the underlying
flowstone
Flowstones are sheetlike deposits of calcite or other carbonate minerals, formed where water flows down the walls or along the floors of a cave. They are typically found in "solution caves", in limestone, where they are the most common speleothe ...
indicates that the fossils are not older than 2.0 million years old. The occurrence of species of animal that became extinct ~1.5 million years ago indicate the deposit is not younger than 1.5 million years old. The sediments have a 'normal' magnetic polarity, and the only major period between 2.0 and 1.5 million years ago when this occurred was the Olduvai sub-Chron between 1.95 and 1.78 million years ago, and so in 2010 the fossil was suggested to be around 1.95 million years old based on the transitional nature of some of the sediments and the stratigraphy at the site.
In 2011 a more accurate date of the fossils was established when a capping flowstone was too old to enable the normal polarity deposits to date to the Olduvai event. The deposits were instead correlated to a ~3000 year long period centred at around 1.977 million years ago and known as the Pre-Olduvai event.
See also
*
List of fossil sites
This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there. Many of t ...
References
External links
Free Images and resources about "Australopithecus sediba" and Malapa for Educators and Students
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Archaeological sites in South Africa
Pliocene
Caves of South Africa
Limestone caves
Landforms of Gauteng
Paleoanthropological sites
Archaeological sites of Southern Africa