Three Holocene Tephras Identified in Lacustrine Sediment Cores from the Wonder Lake Area, Denali National Park and Preserve, Alaska, U.S.A.

1998 ◽  
Vol 30 (1) ◽  
pp. 89 ◽  
Author(s):  
Jonathan K. Child ◽  
James E. Beget ◽  
Al Werner
Keyword(s):  
National Park ◽  
Sediment Cores ◽  
Lacustrine Sediment ◽  
Lake Area ◽  
Denali National Park

scholarly journals Evidence for a hardwater radiocarbon dating effect, Wonder Lake, Denali national park and preserve, Alaska, U.S.A.

2002 ◽  
Vol 53 (3) ◽  
pp. 407-411 ◽  
Author(s):  
Jonathan K. Child ◽  
Al Werner
Keyword(s):  
National Park ◽  
Sediment Cores ◽  
Pollen Record ◽  
Lake Area ◽  
Alaska Range ◽  
Radiocarbon Age ◽  
The North ◽  
Late Wisconsinan ◽  
Denali National Park ◽  
Age Estimates

Abstract Anderson et al. (1994) present a late Pleistocene/Holocene pollen record for lacustrine sediment cores retrieved from the north end of Wonder Lake, Denali National Park and Preserve, Alaska. Bulk radiocarbon age estimates obtained during their study suggest that either a Picea refugium persisted in the foothills of the north Alaska Range near Wonder Lake during the Late Wisconsinan, or that bulk radiocarbon age estimates are inaccurate. Subsequent cores recovered from Wonder Lake (and a near-by kettle pond) have been correlated to the Anderson et al. core and age dated using Atomic Mass Spectrometry (AMS) radiocarbon age estimates. AMS radiocarbon ages suggest that bulk radiocarbon ages from Anderson et al. (1994) are affected by hardwater conditions in Wonder Lake causing them to appear greater than 2000 14 C years too old. The corrected core chronology is consistent with documented regional vegetation changes during the glacial/interglacial transition and does not require a local Picea refugium in the Wonder Lake area during the Late Wisconsinan.

115 years of sediment deposition in the Urft reservoir (Eifel Mountains, western Germany)

2021 ◽  
Author(s):  
Georg Stauch ◽  
Alexander Esch ◽  
Lukas Dörwald ◽  
Verena Esser ◽  
Simone Lechthaler ◽  
...  
Keyword(s):  
Power Plant ◽  
Sediment Cores ◽  
Physical Geography ◽  
Sediment Deposition ◽  
Unmanned Aircraft ◽  
Lake Area ◽  
Hydroelectric Power ◽  
Eifel Mountains ◽  
Western Germany ◽  
Sediment Layers

<p>The sediments of the artificial Urft reservoir represent a unique archive of human influence on late Holocene sediment composition. The Urft dam, located in the Eifel Mountains in western Germany, was built between 1900 and 1905. At the time of its construction, the Urft reservoir was the largest reservoir and, with 12 MW, drove the most powerful water storage power plant in Europe. The reservoir has a length of 12 km and, when fully dammed, has a volume of 45.51 million m³ over an area of 2.16 km². The most important inflow is the river Urft. Today, the Urft Lake is completely enclosed by the Eifel National Park.</p><p>Consequently, sediments were deposited in the lake almost undisturbed over the last 115 years. Due to construction work on the Urft dam and the inspection of the 2.7 km long Kermeter Tunnel, which powers the Heimbach hydroelectric power plant, the reservoir was almost completely drained in November 2020. This offered the rare opportunity to sample the deposits in detail and to record the entire lake area photogrammetrically using an Unmanned Aircraft System (UAS). The work was carried out in cooperation between the Water Board Eifel-Rur (WVER) and the Chair of Physical Geography and Geoecology (PGG) at RWTH Aachen University.</p><p>Within the framework of the project, the sediments in the reservoir will be investigated in detail. The comparison of the high-resolution UAS digital elevation models and historical maps will give insights in the amount of sediment deposition in the different areas of the lake during the last 115 years. Geochemical markers will be used to quantify the anthropogenic influence on the sediments in the form of mining-induced pollutant contamination (e.g., heavy metals) and to relate this to the history of use in the catchment area. Another focus will be on recording the microplastics content of the different sediment layers. Since microplastics have only been introduced into the natural system by humans for the last 70 years since the beginning of mass production around 1950, the sediment layers can also be differentiated in terms of time. For these investigations, a total of ten sediment cores with a length of up to 4 m were taken from the deposits.</p>

scholarly journals Chronology from sediment cores collected in southwestern Everglades National Park, Florida

2013 ◽  
Author(s):  
C.E. Bernhardt ◽  
G.L. Wingard ◽  
D.A. Willard ◽  
M.E. Marot ◽  
B. Landacre ◽  
...  
Keyword(s):  
National Park ◽  
Sediment Cores ◽  
Everglades National Park

scholarly journals Herd structure in Late Cretaceous polar dinosaurs: A remarkable new dinosaur tracksite, Denali National Park, Alaska, USA

Geology ◽  
2014 ◽  
Vol 42 (8) ◽  
pp. 719-722 ◽  
Author(s):  
Anthony R. Fiorillo ◽  
Stephen T. Hasiotis ◽  
Yoshitsugu Kobayashi
Keyword(s):  
Late Cretaceous ◽  
National Park ◽  
Herd Structure ◽  
Denali National Park

Assisted Revegetation in Denali National Park, Alaska, U.S.A.

1987 ◽  
Vol 19 (4) ◽  
pp. 544 ◽  
Author(s):  
R. V. Densmore ◽  
K. W. Holmes
Keyword(s):  
National Park ◽  
Denali National Park

Biogeochemical Stoichiometry Reveals P and N Limitation Across the Post-glacial Landscape of Denali National Park, Alaska

Ecosystems ◽  
2016 ◽  
Vol 19 (7) ◽  
pp. 1164-1177 ◽  
Author(s):  
S. K. Schmidt ◽  
D. Porazinska ◽  
B.-L. Concienne ◽  
J. L. Darcy ◽  
A. J. King ◽  
...  
Keyword(s):  
National Park ◽  
N Limitation ◽  
Denali National Park
Sign in / Sign up

Export Citation Format

Share Document