Geodetic Evidence for Tectonic Deformation in the Eastern United States

1988 ◽  
Vol 59 (4) ◽  
pp. 314-314
Author(s):  
Robert Reilinger

Abstract The historic geodetic data base in the eastern United States dates back over 100 years. Although instrumentation and hence measurement precision has improved since the initial observations, the basic techniques [leveling, triangulation, water level gauging] remained unchanged until the recent introduction of space geodesy [Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Positioning System (GPS)]. Because of this, it has been possible to compare repeated observations to identify apparent changes in relative positions. Such “changes” can reflect observational errors, non-tectonic movements (water level effects, monument instability, loading, etc.) or tectonic/isostatic deformation. A number of possible deformation features in the eastern U. S. have been reported in the literature, including uplift of the southern Appalachian and Adirondack mountains, doming of the Gulf coast inland of the Mississippi delta, subsidence of Chesapeak Bay and along the coast of Maine, horizontal deformation in New York and Connecticut, and possible fault related deformation near Charleston and in the New Madrid area. Unfortunately, it is not dear to what extent any of these features represent tectonic deformations and hence what their significance may be for the earthquake problem. An important recent development in monitoring regional deformation has been the establishment of the eastern U. S. GPS strain network by the National Geodetic Survey. The network consists of roughly 45 sites uniformly distributed east of the Rocky Mountains. The network was established in 1987 and will be reobserved in 1989. Subsequent reobservations will be made at 2 to 5 year intervals depending on analysis of the early measurements. Given the precision of the GPS measurements (few cm in 3-D relative positions), a considerable time period will be required to detect the subtle deformations expected for this intraplate region. Perhaps more immediate information will result from recent progress in recognizing and correcting systematic errors in the historic geodetic data base. This, together with the newly automated historic data base, and improved techniques for integrating and analyzing these extensive observations, provide the necessary basis for effectively evaluating the deformational features listed above. Given the potential importance of these data for understanding tectonic processes (and the huge expense of collecting these measurements over the pst century), such studies should be an integral part of future earthquake studies in the eastern U. S.

1999 ◽  
Vol 64 (4) ◽  
pp. 653-658 ◽  
Author(s):  
John P. Hart ◽  
C. Margaret Scarry

AbstractA radiocarbon date of A.D. 1070 ± 60 was linked to the remains of maize (Zea mays), beans (Phaseolus vulgaris), and squash (Cucñrbita pepo) at the Roundtop site in the Susquehanna River valley of New York by William Ritchie in 1969 and 1973 publications. This date established the presence of beans in the Northeast at an earlier time than in most other areas of the eastern United States, where they are generally rare before A.D. 1300. Subsequently beans have been reported in pre-A.D.1300 contexts from at least eight other sites in the Northeast. Recent calibrated AMS dates on beans from Roundtop are no earlier than A.D. 1300 (Hart 1999a). Given that the original Roundtop date was responsible for the acceptance of early beans in the Northeast, the AMS dates suggested that beans may not become archaeologically visible there until ca. A.D. 1300. AMS dates on beans from four other sites, reported here, substantiate the Roundtop results. Beans and by extension maize-beans-squash intercropping are not evident in the Northeast before ca. A.D. 1300.


Plant Disease ◽  
2009 ◽  
Vol 93 (4) ◽  
pp. 386-394 ◽  
Author(s):  
George W. Sundin ◽  
Nicole A. Werner ◽  
Keith S. Yoder ◽  
Herb S. Aldwinckle

The bacterial antagonists Pseudomonas fluorescens A506, Pantoea agglomerans C9-1, and Pantoea agglomerans E325 and preparations of Bacillus subtilis QST 713 containing bacterial endospores and lipopeptide metabolites were evaluated for efficacy in controlling fire blight in Michigan, New York, and Virginia. When examined individually, the biological control materials were not consistently effective in reducing blossom infection. The average reduction in blossom infection observed in experiments conducted between 2001 and 2007 was variable and ranged from 9.1 to 36.1%, while control with streptomycin was consistent and ranged from 59.0 to 67.3%. Incidence of blossom colonization by the bacterial antagonists was inconsistent, and <60% of stigmata had the antagonists present in 12 of 25 experiments. Consistent control of blossom infection was observed when the biological control materials were integrated into programs with streptomycin, resulting in a reduction of the number of streptomycin applications needed to yield similar levels of control. Our results indicate that the prospects for biological control of fire blight in the eastern United States are currently not high due to the variability in efficacy of existing biological control options.


Author(s):  
Julie Nicoletta

Arriving in the colony of New York in 1774 from England, Ann Lee and her eight followers set about creating a model communal society in what would become the United States. Officially known as the United Society of Believers in Christ’s Second Appearing, the Shakers believed in Christ’s imminent return. Their support of pacifism, near equality between the sexes that allowed women to take on leadership roles, and perfectionism set them apart from most Americans. Within a decade, they had begun creating a Kingdom of Heaven on Earth through their worship, work ethic, and construction of orderly villages with buildings and furniture meant to reinforce religious belief and shape and control behavior. From humble beginnings, the sect created a total of twenty-two communities beginning in the 1780s, spreading from Maine to Indiana and as far south as Georgia and Florida, though these latter two sites and the one in Indiana were short lived. During periods of religious revivalism in the United States in the late 18th and early19th centuries, the Shakers attracted hundreds of converts who gave up their worldly possessions to live celibate, communal lives. After a peak population of over three thousand in the1840s, the Shakers have dwindled to just three members inhabiting the only surviving living community of Sabbathday Lake, near New Gloucester, Maine. The Shakers’ demographic and economic success over several decades left a legacy of buildings at numerous locations throughout the eastern United States. Some of these villages have become museum sites, most notably Hancock, Massachusetts; Mount Lebanon, New York; Canterbury, New Hampshire; and Pleasant Hill and South Union, both in Kentucky. Other Shaker buildings remain as private residences and parts of retirement communities and state prisons. In many ways, Shaker architecture reflects contemporary regional vernacular building practices, such as the closely spaced anchor bents in the framing of the earliest meetinghouses in Connecticut, New Hampshire, Maine, Massachusetts, and eastern New York State, and the rather grand masonry structures of the dwelling houses and trustees’ offices in Kentucky. The linear arrangement of buildings, their large size, and separate entrances for men and women distinguished Shaker buildings from those of the outside world, though stylistically they appeared much like non-Shaker buildings. The Shakers organized building interiors to use space efficiently with many built-in cabinets and drawers, installed pegboards on walls for storage and to help keep floors clear for cleaning, and included separate staircases to demarcate men’s and women’s areas. The buildings, especially the meetinghouses and dwelling houses, reminded Shakers of their commitment to their faith and to their distinctive way of living and encouraged them to “put their hands to work and their hearts to God,” a saying attributed to Ann Lee. Nevertheless, the Shakers were not immune from influences from the outside world. They needed to interact with outsiders to encourage the economic success of their villages and to attract converts. As their population shrank in the latter half of the 19th century, they turned increasingly to hired help to assist with building construction and other aspects of daily life. The Shakers also embraced stylistic changes in architecture and furniture; their buildings of the late 19th and early 20th centuries reflect these influences with added ornamentation inside and out, as well as embellished furnishings either made by the Shakers or purchased from non-Shaker furniture makers. Rather than undercut any appreciation of the simple style for which the Shakers are best known, these changes show the group as always practical and responsive to changes in mainstream society.


2006 ◽  
Vol 23 (4) ◽  
pp. 280-287 ◽  
Author(s):  
René H. Germain ◽  
Kevin Brazill ◽  
Stephen V. Stehman

Abstract Nonindustrial private forestlands (NIPFs) account for a majority of the forested working landscape in the eastern United States. Throughout the United States, NIPF average ownership sizes continue to decline. Smaller parcel sizes create declining economies of scale for forest managersand timber harvesters, threatening the viability of the forested working landscape and, in turn, wood supply. This study documents the parcelization of NIPF holdings in a central New York State county during the last 25 years of the 20th century. The findings indicate the average parcel sizeof NIPFs decreased from 36 to 24 ac over the study period, despite a decline in population in the county. Although average parcel size is declining, a large percentage of the rural forestland remains in acreage classes suitable for forest management, as long as the forest products industrycan adapt to changes on the landscape. North. J. Appl. For. 23(4):280–287.


Botany ◽  
2010 ◽  
Vol 88 (4) ◽  
pp. 336-344 ◽  
Author(s):  
Norton G. Miller ◽  
Sean C. Robinson

The moss Ptychomitrium serratum (C. Müll. Hal. ex Schimp.) Besch., is native to Mexico and parts of western Texas and southern New Mexico, and it is a rare adventive in the area from East Texas and Louisiana to Missouri, Tennessee, South Carolina, and northward to locations near the coast in New York State and Massachusetts. In the adventive part of this calcicole’s range, all collections are from the past 50 years. Concrete, mortar, and rarely asphalt shingle are its only known substrata in this region, which contrasts sharply with its common occurrence on limestone in the native portion of its range. These observations indicate recent, perhaps on-going, immigration into the eastern United States and dispersal from established populations in this region. This monoicous moss commonly produces spores, which are its primary means of spread. Given the low density occurrences in the adventive portion of the range of P. serratum, dispersal may be generally northeastward from Mexico – Texas – New Mexico, following northeastward storm tracks in the southern and eastern United States. The apparently recent spread of this moss does not show obvious reliance on any direct human activity.


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