File:22-15-011-marker.jpg
Original file (2,119 × 3,072 pixels, file size: 2.33 MB, MIME type: image/jpeg)
Captions
Summary
[edit]Description22-15-011-marker.jpg |
English:
Mississippi River Overlook The valley of the Mississippi River is one of the most distinctive landscape features of the central United States. Set in a geologic framework of ancient sea floors and glacial flood waters, this rock-lined corridor hosts interesting communities of plants and animals. For centuries the valley has lured prehistoric and historic populations to its scenic flowing contours of waterways, islands and bluffs. Here in northeastern Iowa, the Mississippi has carved a deep, steep-sided valley into sedimentary bedrock. Between 35 and 10 thousand years ago, this river valley served as a major channel for enormous volumes of glacial meltwater and outwash sand and gravel released from melting continental glaciers to the north and west of this region. The level valley floor, occupied by the town of Guttenberg and Lock and Dam No. 10, is underlain by over 150 feet of these meltwater-transported sediments, indicating deep scouring of the bedrock floor and then partial filling of the river valley. The high bluff here on the west valley wall exposes the internal composition of the landscape into which the Mississippi entrenched its valley. These layered limestone strata are formed of much older deposits of lime-rich muds that accumulated in the shallow, tropical seas that covered this area during Ordovician time, approximately 440 million years ago. (Continued on other side) |
Date | |
Source | Self-photographed |
Author | Dsdugan |
Other versions |
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Camera location | 42° 44′ 52.15″ N, 91° 05′ 21.19″ W | View this and other nearby images on: OpenStreetMap | 42.747820; -91.089220 |
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Licensing
[edit]This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:36, 1 September 2022 | 2,119 × 3,072 (2.33 MB) | Dsdugan (talk | contribs) | Uploaded own work with UploadWizard |
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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 | NIKON CORPORATION |
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Camera model | NIKON D5300 |
Exposure time | 2/1 sec (2) |
F-number | f/8 |
ISO speed rating | 100 |
Date and time of data generation | 20:19, 7 August 2022 |
Lens focal length | 42 mm |
Latitude | 42° 44′ 52.17″ N |
Longitude | 91° 5′ 21.23″ W |
Altitude | 272 meters above sea level |
Software used | GraphicConverter 10 (10.7.5) |
File change date and time | 20:19, 7 August 2022 |
Exposure Program | Aperture priority |
Date and time of digitizing | 20:19, 7 August 2022 |
APEX exposure bias | 0 |
Maximum land aperture | 4.2750070442378 APEX (f/4.4) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 10 |
DateTimeOriginal subseconds | 10 |
DateTimeDigitized subseconds | 10 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Custom process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 63 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS time (atomic clock) | 01:19:20.47 |
Satellites used for measurement | 07 |
Geodetic survey data used | WGS-84 |
GPS date | 8 August 2022 |
GPS tag version | 0.0.3.2 |