1. Basalts synonyms, Basalts pronunciation, Basalts translation, English dictionary definition of Basalts

2. Flood Basalts on Mars and Iceland

3. The Deccan Basalts may have …

4. The Deccan Traps are flood Basalts similar to the Columbia River Basalts of the northwestern United States

5. Large Copper mass from Amygdaloidal basalts

6. Basalts Turn Carbon into Stone for Permanent Storage

7. They are similar to terrestrial Basalts, but have many important differences; for example, mare Basalts show a large negative europium anomaly.

8. Like the underlying flood Basalts, these shields are …

9. Basalts may be broadly classified on a chemical and petrographic basis into two main groups: the tholeiitic and the alkali Basalts

10. Basalts are often porphyritic and can contain mantle xenoliths

11. The basalt tetrahedron is a useful tool for classifying Basalts

12. Mare Basalts formed and crystallized at very low partial oxygen pressures

13. Supposed Beauxites derived from basalts are of the same nature

14. Dome Top Basalts Only: Buy individually or in a three pack

15. Supposed Beauxites derived from basalts are of the same nature

16. These Basalts have been used to determine Colorado River incision rates.

17. When pāhoehoe lava enters the sea it usually forms pillow basalts.

18. The oceanic crust (made of Basalts) is formed on mid-ocean ridges

19. Some basalts of the orogene border seem to be less alkalic.

20. Therefore, these Basalts originated from partial melting of metasomatized asthenospheric (versus lithospheric) mantle

21. Alkali basalts typically have mineral assemblages that lack orthopyroxene but contain olivine.

22. In this respect the Dalma basalts appear to have a modified MORB composition and the closest chemical analogy may be basalts from back-arc basins, i. e. a supra-subduction zone environment.

23. Basalts can also contain quartz, hornblende, biotite, hypersthene (an orthopyroxene) and feldspathoids

24. The mare basalts are denser than the rocks which typify the highlands.

25. The rocks are classified as within-plate alkali basalts and their fractionation products.

26. These Basalts are erupted onto continental crust through fissures rather than typical volcanic edifices

27. The rocks are petrographically similar to but less altered than the Chilcotin basalts.

28. The komatiitic Basalts and the remaining low-MgO Basalts define distinctive clusters and trends on the Al/Ti versus MgO plot, but there is a continuum of compositions into the “nonkomatiitic basalt” grouping

29. Figure 15 shows the oxygen fugacity of mare Basalts as a function of temperature

30. CONTENTS Introduction Environment and occurrence Mineralogy Types of Basalts Origin Deccan traps Conclusion References 2

31. ‘Thick sequences of Basalts form the Morgedal and Gjuve formations and include series of sub-aerial lava flows.’ ‘Further, it is a common vesicle-filling mineral in Basalts.’ ‘It seems unlikely that the final magma pressure would have been the maximum value of magma pressure reached during the intrusive episode, and so flood Basalts

32. Siletzia corresponds geographically to the Coast Range Volcanic Province (or Coast Range basalts), but is distinguished from slightly younger basalts that erupted after Siletzia accreted to the continent and differ in chemical composition.

33. Cenozoic sodic alkali Basalts represent the dominant basalt type in many continental alkali basalt provinces, including northern Europe, eastern Australia, and eastern China (Zhang and O’Reilly, 1997; Zou et al., 2000; Wilson and Patterson, 2001).Sodic alkali Basalts are compositionally similar worldwide (Table 2a) and correspond to Basalts and trachyBasalts with relatively high TiO 2 (∼1

34. Volcanic rocks range from very acidic rhyolites and trachytes to more basic andesites and basalts.

35. Bytownite is also only found in gabbros, whereas labradorite is found in gabbros, basalts, and anorthosites

36. Basalts occur rarely and differ from the andesites only by a slightly higher content in mafic constituents.

37. Mare Basalts are named as such because they frequently constitute large portions of the lunar maria

38. Many alkali basalts may be formed at greater depths, perhaps as deep as 150–200 km.

39. DR4) indicates that these Basalts have shared a similarly heterogenous asthenospheric mantle source in the Cenozoic.

40. The flood Basalts and most of this shield volcano, except for a thin veneer of alkali basalt, are tholeiitic

41. Basalts, basalt series, and basalt classification Basalt in the generic sense = plagioclase + clinopyroxene +/- (olivine, nepheline, hypersthene, quartz, melilite, magnetite)

42. Furthermore, the lack of temporal and spatial variation of Sr-Nd-Hf isotopes of these Basalts (Fig

43. Rare feldspathoid-rich mafic rocks, akin to alkali basalts, may have Na2O + K2O contents of 12% or more.

44. CWU's Nick Zentner presents 'Flood Basalts of the Pacific Northwest' - the 16th talk in his ongoing Downtown Geology Lecture Series

45. This suggests that the mare basalts and the highland rocks have both been derived from mantle rocks of intermediate density.

46. It can be used with te salt, along with urt or efh salts to create icy and stony Basalts

47. Basalts are the rocks which are formed at mid-ocean ridges, and which make up the entire oceanic crust.

48. Decompression melting of the mantle associated with back-arc generation resulted in mantle melting and the formation of the alkalic basalts.

49. Keweenaw Amygdaloidal basalts have long had significant economic importance because native copper (Cu) is one of the more common vesicle-filling mineral

50. At 1100 deg C, the oxygen fugacity in mare Basalts is about 10-13 compared with about 10-58 in

51. At least some of the Basalts (probably a small proportion) in the nominally nonkomatiitic cluster may be ultimately derived by

52. But whereas the mare basalts are too dense to represent the lunar mantle, the highland rocks are not dense enough.

53. (2) This is the only location where Bedded sedimentary rocks were observed to be in direct contact with the pillow basalts

54. 18 Electron microprobe element maps show the distribution and quantity of alkali feldspar in the fine-grained groundmass of the altered basalts.

55. High-Ti and Low-Ti Basalts have been distinguished in the Paraná and Etendeka traps a nd the Emeishan Traps.

56. The Columbia River Basalts, erupted 15 to 17 million years ago, cover most of southeastern Washington and regions of adjacent Oregon and Idaho

57. Pre-accretionary volcanic and plutonic rocks of arc and ocean-floor tectonic affinities have crystallization ages of 1.906-1.901 and 1.888-1.881 Ga; the earlier period was dominated by juvenile tholeiitic arc basalts and related back-arc-basin basalts, and the younger period by juvenile calc-alkaline volcanic rocks and turbidites.

58. Most Archean greenstones are composed chiefly of subaqueous basalts (Figure 3.31) and komatiites (ultramafic volcanics) with minor amounts of felsic tuff and layered chert.

59. Augite is an important rock-forming mineral in many igneous rocks, especially in gabbros and basalts, and is also found in some hydrothermal metamorphic rocks

60. Mid-oceanic ridge Basalts (MORBs) are depleted in incompatible elements, but ridge segments far from mantle plumes frequently erupt chemically enriched MORBs (E-MORBs)

61. Lava flows (called flood Basalts or traps) and volcanic ash bury preexisting terrain, as exemplified by the Columbia Plateau in the northwestern United States

62. Ocean island Basalts (OIB) are particularly variable in composition such that several isotopically distinct mantle source end‐members (e.g., “DM”, “EM1”, “EM2”, “HUMU

63. Lunar basalts differ from their Earth counterparts principally in their high iron contents, which typically range from about 17 to 22 wt% FeO.

64. Basalts from the region of the orogene and from the Hungarian Plain show a strong tendency towards the formation of alkali rich rock types.

65. The thick, layered lava flows of the CRBG erupted as flood Basalts, which originate as some of the most highly effusive eruptions in the world

66. Basalts are a group of fine-grained extrusive igneous rocks that have a relatively low silica content, but otherwise vary significantly in composition and appearance

67. Whole rock and mineral analyses of about 30 spinel lherzolite and harzburgite xenoliths from Tertiary alkali olivine basalts, limburgites and olivine nephelinites have been performed.

68. 12.109 Lecture Notes October 25, 2005 Handout: Basalts Basalts—closest thing to melts of the mantle, have the potential to record interior processes: P,T distribution + heterogeneities in a planetary interior, information on volatiles like CO 2, H 2 O, S, F, Cl Basalt tetrahedron—composition space with normative minerals in basalt composition, for classification (see handout) Developed by

69. Many of the Basalts of the ESRP erupted along volcanic rift zones (VRZ) that are oriented parallel to the direction of regional basin and range extension

70. All Basalts, regardless of where they were formed, are similar because the process that formed them (melting in the interior of a planet) is the same

71. Mantle plumes induced asthenosphere upwelling and development of magma chambers along deep-sited faults, and thus resulted in fracture eruption of flood basalts on large scale.

72. Lunar surface Basalts are believed to have their origins in partially melted areas 100-400 kilometers (60-250 miles) beneath the large meteoroid impact basins

73. The lower (younger?) thrust emplaces Precambrian basalts and tuffaceous siltstones (Coldbrook Group) over alluvial sediments of the Boss Point and Tynemouth Creek formations (Westphalian A–B).

74. Basalts and alkali-feldspar rhyolites, associated in some places with ignimbrites, occur in volcanic bodies that are interlayered with pyroclastic and fossiliferous Upper Cretaceus sedimentary rocks.

75. Olivine, titanaugite, kaersutite, and plagioclase indicate that these rocks formed as a single suite of hydrous alkali basalts, possibly as part of a seamount near a continental margin.

76. Although basalts vary widely in composition and other physical factors, many of the properties of a Basaltic rock mass appear to vary within a factor of about …

77. The within-plate basalts differ from those of MORB affinity by LREE-enriched patterns; higher TiO2, Nb, Ta, and Th abundances; lower eNd values; and correlatively higher isotopic Pb ratios.

78. Two major explanations of E-MORBs are that these Basalts are generated by the melting of entrained recycled crust (pyroxenite) beneath ridges or by the melting of refertilized peridotites.

79. Twenty-five samples of altered silicic volcanic rocks associated with the Keweenawan altered basalts at Mamainse Point, Ontario, were analysed for major elements, Li, Rb, Sr, and Ba.

80. The Ortley Anticline is the highpoint to the east of the Mosier Syncline, and comprises the Columbia Hills on the Washington side and the Rowena basalts on the Oregon side