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Wind: ACT Earth Science

Ace Academics Ace Academics ePub
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Conclusion

Elizabeth Emma Ferry Indiana University Press ePub

  CONCLUSION

I conclude with two images of Mexican minerals: one moving through space and the other through time.

Two Stories

In the spring of 1998, as we were preparing to return to the United States after twenty months of fieldwork, my husband and I gave a party at our house to say good-bye to our neighbors and friends. We rented chairs and a tent, hired a band, and engaged our neighbor and friend Paco to kill a pig and make carnitas. Our guests included our neighbors in the town of Santa Rosa de Lima, miners, and other cooperative members, faculty and students from the University of Guanajuato, and a regidor (alderman).

Although it is not as common for people to bring gifts to a party (such as a bottle of wine or flowers) as it is in some U.S. contexts, one cooperative member, who worked in the automotive department, brought me a small rock wrapped in tissue paper. It was a specimen of native silver growing out of a base of black acanthite (silver sulfide). The silver looked like the slightly curved bristles on a toothbrush. The specimen came from the El Cubo mine, he told me, and he wanted to give it to me to remind me of my friends in Guanajuato. I was delighted to receive this gift and carried it back to the United States with pride.

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Fluids: ACT Physics

Ace Academics Ace Academics ePub
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8 East Kirkton and the Roots of the Modern Family Tree

Jennifer A. Clack Indiana University Press ePub

8.1. (Color Plate 15) The East Kirkton Quarry site once clearance was complete and a section had been excavated through the sequence, with the author standing at the level of unit 82, where most of the best tetrapod specimens have come from. Photograph by R.N.G.C.

Background to the East Kirkton Locality

A small former mining town called Bathgate, about 20 miles from Edinburgh, Scotland, has recently been made famous in the paleontological world for being the location of a window through which to view an extraordinary episode in evolutionary history. At the edge of a housing estate lies a quarry where in the 19th century a rock called the East Kirkton Limestone was dug out. It had some curious qualities that made it attractive as a building stone and hard wearing for making the local farm walls.

It is composed of thinly alternating bands of dark carbonaceous limestone, pale silica, and hardened gray volcanic ash called tuff, and often the bands are speckled with small white nodules or twisted and distorted into intriguing curls and waves. In the 1830s, fossil collectors also found some unusual specimens, which are now recognized as the carapaces of eurypterids or sea scorpions, as well as many plant remains. The quarry was closed in about 1844, and though geologists visited occasionally afterward, it was eventually forgotten and became grown over.

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6 The NCSU/APHIS Plant Pest Forecasting System (NAPPFAST)

Venette, R.C. CABI PDF

6

The NCSU/APHIS Plant Pest

Forecasting System (NAPPFAST)

Roger D. Magarey,1* Daniel M. Borchert,2 Glenn A.

Fowler2 and Steven C. Hong1

1Center

for Integrated Pest Management, North Carolina State

University, Raleigh, North Carolina, USA; 2Plant Epidemiology and

Risk Analysis Laboratory, Center for Plant Health Science and

Technology, Plant Protection and Quarantine, Animal Plant Health

Inspection Service, USDA, Raleigh, North Carolina, USA

Abstract

This chapter describes the North-CarolinaState-University/Animal-and-Plant-HealthInspection-Service Plant Pest Forecasting

System (nappfast). nappfast, developed for pest risk modelling and mapping, was formerly used to support pest detection, emergency response and risk analysis for the US Department of Agriculture. nappfast employs an internet-based graphical user interface to link weather databases with interactive biological model templates. The weather databases include historical daily weather databases for North

America and the world. The templates include degree-days, generic empirical models, infection periods and the Generic

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