File:Homo erectus (fossil hominid skull) & indochinite tektites (Pleistocene; southeastern Asia) 4 (45586408531).jpg
Original file (2,793 × 2,996 pixels, file size: 4.96 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionHomo erectus (fossil hominid skull) & indochinite tektites (Pleistocene; southeastern Asia) 4 (45586408531).jpg |
Homo erectus (Dubois, 1893) - fossil hominid skull (cast) from Indonesia + Indochinites (black) - tektites from China and Cambodia + Early hominid tools from Africa From exhibit signage: Splash Form Tektites - Indochinites These specimens were formed from molten impact glass as it spun and cooled while falling through the atmosphere ~800,000 years ago. The black color comes from reduced iron in the glass. The indochinites are part of the Australasian Tektite Field. Tektites are comprised of glass formed from asteroid impacts or meteoritic aerial fireballs that caused widespread melting of the Earth's crust. The Australasian Tektite Strewn Field formed 800,000 years ago, and covers 10% of the Earth's surface. No associated crater has yet been found. Some researchers posit that the huge area of the strewn field was the result of a massive, poorly consolidated asteroid (rubble pile) breaking apart in the atmosphere, generating multiple fireballs and impacts. The highest concentration of the glass is in southeastern Asia (indochinites). A Bad Day for Homo erectus? Homo erectus hand-axes were found in southeastern China buried with Australasian tektites (meteoritic impact glass) and evidence of a widespread forest burning event dated at ~800,000 years (Yamei et al., 2000). This event must have devastated life in southeastern Asia. The Homo erectus cranial cast (Sangiran 17) in the display comes from that time interval in Java, Indonesia (within the tektite field). In the display, the tektites, referred to as indochinites, are from China and Cambodia, and the Acheulean hand axes are from North Africa. Reference cited: Yamei et al. (2000) - Mid-Pleistocene Acheulean-like stone technology of the Bose Basin, South China. Science 287: 1622-1626. |
Date | |
Source | Homo erectus (fossil hominid skull) & indochinite tektites (Pleistocene; southeastern Asia) 4 |
Author | James St. John |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/45586408531 (archive). It was reviewed on 6 November 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 November 2018
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 04:45, 6 November 2018 | 2,793 × 2,996 (4.96 MB) | Lu Brito (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 10:06, 5 May 2018 |
Lens focal length | 6.2 mm |
Width | 3,000 px |
Height | 4,000 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 00:35, 17 July 2018 |
Exif version | 2.21 |
Date and time of digitizing | 10:06, 5 May 2018 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.904761905 |
Focal plane Y resolution | 16,483.517241379 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6mm |
Date metadata was last modified | 20:35, 16 July 2018 |
Unique ID of original document | BF05588AB43B6B34F63F0633F6EFF47D |
IIM version | 2 |