Conservation of an Eocene petrified forest at Florissant Fossil Beds National Monument: Investigation of strategies and techniques for stabilizing in situ fossil stumps

2008 ◽  
Author(s):  
Jennifer L. Young ◽  
Herbert W. Meyer ◽  
George E. Mustoe
Keyword(s):  
National Monument ◽  
Petrified Forest

Ecology of periphyton in a meltwater stream ecosystem in the maritime Antarctic

2003 ◽  
Vol 15 (2) ◽  
pp. 189-201 ◽  
Author(s):  
JOSEF ELSTER ◽  
ONDREJ KOMAREK
Keyword(s):  
Linear Models ◽  
Environmental Parameters ◽  
Dry Weight ◽  
Physico Chemical ◽  
Cell Mortality ◽  
Periphyton Biomass ◽  
Negative Relationships ◽  
Microscope Slides ◽  
Petrified Forest

The ecology of two meltwater streams on King George Island, Ornithologists Creek (with penguin rookeries close to its lower reaches) and Petrified Forest Creek (a highly oligotrophic system), was studied during the 1996–97 summer season. To estimate seasonal productivity of the periphyton and to establish which environmental parameters influenced periphyton growth most strongly, two types of artificial substrata (fibreglass nets – ash-free dry weight (AFDW), and microscope slides – Chlorophyll a (Chl a)) were tested in situ. Thus relative periphyton productivity (RPP) reflects algal colonization and growth as well as losses due to cell mortality and abrasive action of moving sediments. The Petrified Forest Creek was more productive (AFDW = 108.63 μg cm−2 d−1, Chl a = 0.35 μg g cm−2 d−1) than the Ornithologists Creek (AFDW = 69.90 μg cm−2 d−-1, Chl a = 0.26 μg cm−2 d−1). RPP differed both along the streams, and during the season. Significant positive or negative relationships (generalized linear models) were found between RPP and streamwater ‘physico-chemical parameters’ and ‘geomorphological-geographical characteristics’ of the streams' catchments. In addition, in the lower reaches of both streams almost no active colonization or growth was recorded. In the Petrified Forest Creek, the periphyton biomass was so high that mainly passive organic matter deposition occurred. By contrast, in the lower reach of Ornithologists Creek, periphyton colonization and growth was around zero, being negatively influenced by penguin excrement. Ornithologists Creek was richer in nutrients (DIN, DRP), which also fluctuated more widely along its length and throughout the season, than in the Petrified Forest Creek. Parameters associated with the inorganic carbon cycle of the streamwater reflect higher RPP in Petrified Forest Creek. Moreover, RPP was higher in stream reaches with higher amounts of gravel boulders on the bottom.

scholarly journals Middle Eocene trees of the Clarno Petrified Forest, John Day Fossil Beds National Monument, Oregon

PaleoBios ◽  
2014 ◽  
Vol 30 (3) ◽  
Author(s):  
Elisabeth A. Wheeler ◽  
Steven R. Manchester
Keyword(s):  
Middle Eocene ◽  
National Monument ◽  
John Day ◽  
Petrified Forest

Stranger in a Strange Land: A Brief History of the Paleontological Operations at Dinosaur National Monument

1990 ◽  
Vol 9 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Daniel Chure ◽  
John McIntosh
Keyword(s):  
National Park ◽  
Upper Jurassic ◽  
Morrison Formation ◽  
Carnegie Museum ◽  
National Monument ◽  
Dinosaur National Monument ◽  
Park Service ◽  
History Of ◽  
Research Facilities

Discovered in 1909 by Earl Douglass of the Carnegie Museum, the Dinosaur Quarry (DQ) at Dinosaur National Monument has proven to be one of our best windows into the large vertebrate community of the Morrison Formation (Upper Jurassic). To date, the remains of several hundred individuals belonging to sixteen species of dinosaurs and other vertebrates have been found. The DQ has produced more species, skulls, juveniles, and complete skeletons than any other Morrison Formation quarry. Between 1909 and 1924, the DQ was actively quarried and over 700,000 lbs. of fossils were collected. In 1958 the National Park Service enclosed the unexcavated area of the DQ within a building with both exhibits and research facilities. Since that time over 2,000 bones have been uncovered and left in situ, just as they were deposited. The concept of an enclosed quarry with an in situ exhibit of fossils has been successfully followed at a number of parks both within the U.S. and abroad.

scholarly journals CONSERVATION AND MAINTENANCE CONCEPTS OF SOONG CHING LING’S DOLOMITE MARBLE STATUE IN SHANGHAI AND SUPPORTING SURVEY METHODS

2021 ◽  
Vol XLVI-M-1-2021 ◽  
pp. 579-584
Author(s):  
T. Qin ◽  
Y. Wang ◽  
J. Li ◽  
Z. Tang ◽  
S. Dai
Keyword(s):  
Survey Methods ◽  
Monitoring Program ◽  
Climatic Data ◽  
Republic Of China ◽  
National Monument ◽  
Dolomite Marble ◽  
Marble Statue ◽  
Maintenance Work ◽  
Ultrasonic Ct

Abstract. The dolomite marble statue of Madam Soong Ching Ling, Honorary Chairlady of the People’s Republic of China, is situated in the memorial square of Soong Ching Ling’s Mausoleum in Shanghai, China. The statue is composed of 4 pieces of white marble (Hanbaiyu) from Fangshan, Beijing. The statue, along with the mausoleum, has been listed as a national monument since 1982, yet severe deterioration occurred in recent years. In May 2018, a diagnostic investigation of the statue was carried out. Aided by advanced photogrammetry methods such as 3D modelling, macro photography and infrared thermography, all micro cracks were identified and labelled. Other advanced in-situ and laboratory surveys such as in-situ microscope, ultrasonic CT inspection, chalking evaluation test and mineralogical investigation were applied to further evaluate the condition. Based on analysis of all test results, conservation and maintenance concepts including a monitoring program specifically to control cracking has been developed. This concept was approved by the authorities and implemented in May 2019. After two years’ exposure, an evaluation of previous conservation and a new maintenance work were recently completed in April 2021. A long-term monitoring strategy as well as maintenance methods will be worked out based on the evaluation of all implemented efforts and climatic data.

scholarly journals The Plaka petrified forest park in western Lesvos - Greece

2007 ◽  
Vol 40 (4) ◽  
pp. 1880 ◽  
Author(s):  
N. Zouros ◽  
E. Velitzelos ◽  
I. Valiakos ◽  
O. Labaki
Keyword(s):  
Protected Area ◽  
Root Systems ◽  
History Museum ◽  
Forest Park ◽  
Standing Trees ◽  
The Rich ◽  
Natural Monument ◽  
Intact Root ◽  
Petrified Forest

On the island of Lesvos, large accumulations of fossilised tree trunks comprise the Lesvos Petrified Forest a protected natural monument. Within the protected area of the Lesvos Petrified Forest Geopark, several fossil sites with impressive fossilized trees have been discovered along the coast. During the last few years, the Natural History Museum of the Lesvos Petrified Forest has conducted systematic scientific research on these sites. The coastal area ofPlaka was one of the main sites of research interest in order to explore the terrestrial and marine fossil sites. Several clusters of petrified trees have been found and identified in 45 different fossil sites. Some of them were standing while others were lying. The intact root systems of the standing trees provide proof that these trees were petrified in situ. Most of the trees are angiosperms and gymnosperms. The coastal landscape and its rich ecosystem, and the fossil sites, in combination with volcanic, tectonic and geomorphological structures, are basis of the rich geotouristic potential of the new Plaka Park, which has become an area for environmental education as well as a new geotouristic attraction.

Sign in / Sign up

Export Citation Format

Share Document