Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Peter C Keller"'
Publikováno v:
Native Plants Journal. 7:108-112
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaf78b5ef87ba633e7a42ac3d6280679
https://doi.org/10.2979/npj.2006.7.2.108
https://doi.org/10.2979/npj.2006.7.2.108
Autor:
Peter C. Keller, Diana Hocking
Publikováno v:
Cartography and Geographic Information Systems. 20:157-166
A user survey was conducted to solicit reactions to nonconventional atlas publication and distribution formats. As part of a broader study soliciting user input when specifying thematic content and design for a new provincial atlas of British Columbi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::294bfad6085c7412a5a5d7ae5b69bf76
https://doi.org/10.1559/152304093782637406
https://doi.org/10.1559/152304093782637406
Autor:
Peter C. Keller, Patrick B. Stickler
Publikováno v:
AIP Conference Proceedings.
Reusable Launch Vehicles (RLV’s) utilizing LOX\LH2 as the propellant require lightweight durable structural systems to meet mass fraction goals and to reduce overall systems operating costs. Titanium honeycomb sandwich with flexible blanket TPS on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb365d9c9188e47da18cdabf7fa8354d
https://doi.org/10.1063/1.54717
https://doi.org/10.1063/1.54717
Autor:
Peter C. Keller
Publikováno v:
Gemstones and Their Origins ISBN: 9781468466768
Molten lava erupting from fissures or volcanoes on the earth’s surface may be a source for gemstones. These hot lavas may contain gems in one of three ways: (1) Gemstones such as moonstone may be an essential constituent of the lava and crystallize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70dc30480ee749a1846723e290434ded
https://doi.org/10.1007/978-1-4684-6674-4_5
https://doi.org/10.1007/978-1-4684-6674-4_5
Autor:
Peter C. Keller
Publikováno v:
Gemstones and Their Origins ISBN: 9781468466768
When hot magma rises through the earth’s crust, it often fails to reach the surface to erupt as a volcano. Instead, it forms large magma bodies that cool very slowly to form large granitic masses, which, if large enough, are called batholiths.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::502cff0eac9eac82f671f9ef423e9335
https://doi.org/10.1007/978-1-4684-6674-4_3
https://doi.org/10.1007/978-1-4684-6674-4_3
Autor:
Peter C. Keller
Publikováno v:
Gemstones and Their Origins ISBN: 9781468466768
When gemstones are hard and tough enough to withstand mechanical breakdown, chemically resistant to attack by natural acids or bases, and dense enough to be concentrated, they can form secondary placer or alluvial deposits. Diamonds, rubies, sapphire
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09cf8e4fe93f97345107dd9703e25ab9
https://doi.org/10.1007/978-1-4684-6674-4_1
https://doi.org/10.1007/978-1-4684-6674-4_1
Autor:
Peter C. Keller
Publikováno v:
Gemstones and Their Origins ISBN: 9781468466768
Of all the rock types encountered on Earth, none is more gemologically important for its variety and quantity of gemstones than the igneous bodies known as pegmatites. More gemstones are found in pegmatites than in any other type of deposit. Pegmatit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecd1fd62b466b27fff25444157f9b70c
https://doi.org/10.1007/978-1-4684-6674-4_4
https://doi.org/10.1007/978-1-4684-6674-4_4
Autor:
Peter C. Keller
Publikováno v:
Gemstones and Their Origins ISBN: 9781468466768
Low-pressure metamorphism can take place locally, as contact metamorphism, or over large areas, as regional metamorphism (Figure 6–1). When hot magma intrudes into the cool surrounding rock, the rock is heated and saturated by hydrothermal fluids a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e40ecb7ac09db3fe3daf6f0b5f94c8f9
https://doi.org/10.1007/978-1-4684-6674-4_6
https://doi.org/10.1007/978-1-4684-6674-4_6
Autor:
Peter C. Keller
Publikováno v:
Gemstones and Their Origins ISBN: 9781468466768
One of the few windows through the earth’s relatively thin crust into its underlying mantle is the diatreme or pipe that occasionally has pierced the crust to bring mantle material such as diamond to the surface (Fig. 9–1). Experimental work has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad6f5b43b4b71134d53021375b12599d
https://doi.org/10.1007/978-1-4684-6674-4_9
https://doi.org/10.1007/978-1-4684-6674-4_9