?igneous

igneous發(fā)音

英：[??gn??s]　　美：[??ɡn??s]

英：　　美：

igneous中文意思翻譯

adj.(指巖石)火成的, 火的, 似火的

igneous同義詞

pyrogenic | pyrogenous | eruptive | fiery

igneous反義詞

aqueous

igneous常見(jiàn)例句

1 、In the mafic large igneous province formed by plume magmatism, the granites associated with continental flood basalts are non-orogenic, intraplate and A-type granites rather than S-type.───地幔柱巖漿作用形成的“鎂鐵質(zhì)大火成巖省”中，出現的少量花崗巖是非造山、板內或A-型花崗巖，而不會(huì )是S-型花崗巖。

2 、The relationship of gas and rock-burst and the mechanism of igneous rock-burst in the condition of igneous geological structure are analyzed in this paper.───主要分析了在火成巖地質(zhì)構造下，瓦斯與沖擊礦壓的關(guān)系及火成巖型沖擊礦壓的發(fā)生機理。

3 、They occur in all kinds of magmatic, igneous and hypometamorphic rocks and iron, copper, gold and other multi-metal deposits.───它可以在各類(lèi)巖漿巖、火山巖、深變質(zhì)巖以及鐵、銅、金等多金屬礦床中出現。

4 、Igneous activity had ceased by the beginning of the Tertiary period, 60million years ago.───6000萬(wàn)年前的第三紀初期，巖漿活動(dòng)已經(jīng)停止。

5 、Italy's Mount Etna provides a vivid image of one of the birthplaces of igneous rock during a night eruption.───意大利的埃特納火山在一個(gè)晚上的噴發(fā)展現了一個(gè)巖漿巖誕生地的鮮明形象。

6 、Most igneous rocks in Langgu depression are products of Cenozoic magma action, with diabase intrusion and subwater effusive basalt as major forms.───廊固凹陷內火成巖主要是新生代巖漿多期活動(dòng)的產(chǎn)物。

7 、Were Large Igneous Provinces Caused by Mantle Plumes?───大火成巖省是地幔柱作用引起的嗎?

8 、Teaching and Research Group of Mineralogy and Petrology, Nanjing University. 1980. Petrology of Igneous Rocks [M]. Geological Publishing House, Beijing (in Chinese).───南京大學(xué)地質(zhì)系礦物巖石教研室.1980.火成巖巖石學(xué)[M].北京:地質(zhì)出版社.

9 、Its compounds are found in practically all igneous rocks and their sand deposits.───幾乎在所有的火成巖及其沙塵堆積物中都可找到其混合物。

10 、Any of a group of chemically and physically related aluminum silicate minerals, common in igneous and metamorphic rocks, characteristically splitting into flexible sheets used in insulation and electrical equipment.───云母化學(xué)上和物理上有聯(lián)系的鋁硅酸鹽礦物群的總稱(chēng)，常見(jiàn)于火成巖和變質(zhì)巖中，以易裂成柔軟的薄片為特征，用于絕緣體及電氣設備中

11 、In the high-resolution seismic profile, to directly identify the diapir is often difficult due to much similarity between diapir and the invasion of igneous rock, thus leading to multi-resolution.───在高分辨率地震剖面解釋中，直接識別泥底辟構造存在一定困難，主要因為泥底辟構造和火成巖侵入體在形態(tài)上十分相似，容易造成解釋的多解性。

12 、Type of igneous rock that contains abundant and approximately equal amounts of plagioclase and potash feldspar, as well as other minerals.───含大量且近于等量的斜長(cháng)石和鉀長(cháng)石的火成巖，還含有其他礦物。

13 、Biblical, igneous, jagged, hateful, pointy, ninja rocks, and that's not gonna happen again.─── 圣經(jīng)中那種熾熱粗糙 可憎尖銳的忍者石 不會(huì )再重蹈覆轍了

14 、A vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks.───一種玻璃質(zhì)礦物,由鋁硅酸鹽和氯化組成,呈晶體狀,見(jiàn)于火成巖中。

15 、The magmatic rock intrudes relative seriously in Wangying Colliery, rock-burst and gas outburst mainly take place near igneous rock wall.───摘要王營(yíng)煤礦的巖漿巖侵入比較嚴重，沖擊礦壓和瓦斯突出多發(fā)生在火成巖墻附近。

16 、Because they cool slowly the mineral crystals have enough time to grow to a size which can be easily seen with the naked eye. Thus the intrusive igneous rocks usually have a coarse texture.───巖石中礦物晶體就有足夠的時(shí)間結晶生長(cháng)，這樣，巖石中礦物便足夠的大，以致于用肉限也可辨認它們。所以侵入巖通常具有粗粒結構。

17 、The dress material of blending of coverall taboo nylon, chemical fibber or cotton, chemical fibber makes, in case coverall receives rate of burn of igneous combustion accentuation.───工作服禁止使用尼龍、化纖或棉、化纖混紡的衣料制做，以防工作服遇火燃燒加重燒傷程度。

18 、Containing little silica, as igneous rocks.───基性的基性的，含有比較少量的二氧化硅的作為火成巖的

19 、He says, everybody can hide below desk, igneous opportunity is viewed inside blacker drawer umbriferous.───他說(shuō)，大家會(huì )躲在課桌下，在比較黑的抽屜內觀(guān)看火機投影。。

20 、Lower Carboniferous is composed of sea facies fragments and mid-acidic component igneous rock.───下石炭統為海相碎屑巖及中酸性巖組合 ;

21 、A mass of igneous rock filling the vent of a volcano.───巖頸填滿(mǎn)一座火山的一塊火成巖

22 、Hydrocarbons commonly occur in sedimentary basins and are absent from intervening areas of igneous and metamorphic rocks.───在沉積盆地中，碳氫化合物很常見(jiàn)，而在間雜的火成巖與變質(zhì)巖中則找不到。

23 、Geology A body of intrusive igneous rock of which less than 100 square kilometers (40 square miles) is exposed.───巖株：一種侵入性火成巖體，少于100平方公里(40平方英里），暴露在地表外

24 、A large mass of igneous rock that has melted and intruded surrounding strata at great depths.───巖基大量的已經(jīng)熔化并已侵入周?chē)貧r層的火成巖

25 、Using reservoir engineering methods, technical limits for the efficient development of Luo 151 igneous reservoir have been studied for determining rational technical parameters.───利用油藏工程方法,研究羅151塊火成巖油藏開(kāi)發(fā)技術(shù)政策界限,以確定此類(lèi)油藏合理的開(kāi)發(fā)技術(shù)參數,為該類(lèi)油藏合理、有效的開(kāi)發(fā)提供技術(shù)支持。

26 、The molten rock material under the earth's crust, from which igneous rock is formed by cooling.───巖漿地球外殼內部的熔融巖石物質(zhì)，冷卻后形成火成巖

27 、India, South America a lot of people think, chili exterior is similar male genital, flavour is stimulated tartly, positive-appearing image is like igneous love.───印度、南美洲很多人認為，辣椒外觀(guān)類(lèi)似男性生殖器，味道辛辣刺激，正像如火的愛(ài)情。

28 、An igneous rock composed chiefly of plagioclase and orthoclase, with small amounts of other minerals.───二長(cháng)巖一種主要由斜長(cháng)石和正長(cháng)石組成的火成巖，還含有少量其它礦物

29 、I wonder if there are further classifications of igneous rocks.───我想知道火成巖還有進(jìn)一步的類(lèi)型劃分嗎?

30 、Batteries of a few Suo Ni jotter ever been producinging igneous event last year.───客歲一些索尼筆記本電池曾發(fā)生過(guò)著(zhù)火事務(wù)。

31 、Derived from magma poured out or ejected at the earth's surface. Used of igneous rocks.───噴出的火山的來(lái)自于噴出或噴在地表的巖漿的。用于火成巖

32 、Like many of the names used by scientists, the igneous rocks get their name from a Latin word "ignis" which means "fire".───像科學(xué)工作者所用的許多名稱(chēng)那樣，火成巖的名稱(chēng)來(lái)自拉丁文字的“ignis’，意思是“火”。

33 、BGS Igneous Rock Classification Scheme NADMSC-SLTT Vocanic Materials IUGS Igneous Rock.───中國火成巖巖石分類(lèi)和命名方案。

34 、Metamorphic rocks are called changed rocks because they were originally either igneous or sedimentary rocks that have been transformed into a total different kind of rock.───變質(zhì)巖也可稱(chēng)為發(fā)生了變化的巖石，因為它們原來(lái)是火成巖或沉積巖，后經(jīng)改造而變成一種完全不同類(lèi)型的巖石。

35 、Geologists classify igneous rocks according to the depth at which they formed in the earth's crust.───地質(zhì)學(xué)家根據巖石在地球上形成的深度對它們進(jìn)行分類(lèi)。

36 、The earth movements associated with the orogeny triggered an extensive igneous activity.───伴隨著(zhù)造山運動(dòng)的地殼運動(dòng)出發(fā)了一場(chǎng)廣泛的火成活動(dòng)。

37 、Igneous or metamorphic rock composed largely or dominantly of amphibole minerals.───大部分或主要由角閃石族礦物組成的一種巖石。

38 、In Tazhong Area, the main factor of impacting average velocity is the depth of stratum and lithology of igneous.───在塔中地區，影響平均速度的主要因素是地層埋深和火成巖的巖性。

39 、Our most recent experiences with the igneous rock were more than adequately handled with the new diaphragmoperated bypass valve drill bit.─── 我們有關(guān)火成巖層的最新經(jīng)驗是 使用膜片旁通閥鉆頭 足以應對

40 、Through research, the paper is intended to suggest a complete technology which is applicable for the development of igneous rock of this area.───在地質(zhì)研究的基礎上,提出適合本區火成巖開(kāi)發(fā)的配套技術(shù)。

41 、Three main rock types make up the geology of Singapore: igneous, sedimentary and alluvium. Where is the main source of granite found?───形成新加坡地質(zhì)的三種主要巖石類(lèi)型：火成巖、沉積巖和沖積巖。哪里是花崗巖的主要來(lái)源地?

42 、Because of tectonic movement, there is large igneous intrusion in the working area and changed physical properties of coal and rock in different extent.───因地質(zhì)構造運動(dòng),采區內有大面積巖漿巖侵入,不同程度地改變了煤巖物理性質(zhì)。

43 、A mass of igneous rock intruded between layers of sedimentary rock,resulting in uplift.───巖蓋一種侵入沉積巖巖層之間的火成巖，它會(huì )產(chǎn)生隆起。

44 、My concern would be not so much the heat as the possibility of igneous layers over the shale deposits.─── 我倒不是很擔心高溫 而是擔心頁(yè)巖沉積層上 有火成巖層的可能

45 、Actually, gu Ge is early begin to follow Microsoft in network browser market to dry, it adopts advertisement collaboration form all the time, it is igneous fox bankroll to support.───實(shí)際上，谷歌早就開(kāi)始在網(wǎng)絡(luò )瀏覽器市場(chǎng)跟微軟對著(zhù)干，它一直通過(guò)**合作形式，為火狐貍提供資金支持。

46 、The branch of petrology that deals with the origin of rocks, especially igneous rocks.───巖石成因說(shuō)，巖石發(fā)展學(xué)研究巖石成因的巖石學(xué)的一個(gè)分支，尤其是火成巖的成因

47 、He even had to park his car out in the street, as his garage was stacked up to the rafters with a multitude of samples of igneous rock.───他甚至不得不把車(chē)停在大街上，因為他的車(chē)庫里堆滿(mǎn)了各種各樣的火成巖的標本，一直堆到房椽上。

48 、Headachy trouble, not anxious, more anxious easier inside igneous flourishing, close to instead unripe blain, begin from fountainhead together, in joining remedial adjustment daily skin to nurse.───令人頭痛的煩惱，不要著(zhù)急，越著(zhù)急越輕易內火旺，反而促生痘痘，一起從源頭著(zhù)手，將治療調節加入日常皮膚護理中。

49 、A study of integrated application is conducted on a shallow surface covered with igneous rocks by using the data from gravitational, magnetic and magnetotelluric fields, abundant information ...───利用重力場(chǎng)、磁力場(chǎng)和大地電磁場(chǎng)資料,在淺地表覆蓋火成巖地區進(jìn)行綜合應用研究,得到了豐富的反映地質(zhì)結構的信息。

50 、Seismic deposition and seismite distribution have the same time and space with volcanism and igneous in Jishan sandstone body.───惠民凹陷中央隆起帶基山砂體中，震積作用及震積巖分布與火山作用、火成巖分布具有同時(shí)間性與同空間性。

51 、In the igneous rock formation, CBIL shows fractures, vugs and weathered residual gravel clearly.───在火成巖地層中，它清晰地顯示裂縫、孔洞以及風(fēng)化殘積的礫石。

52 、A change within an intrusive igneous rock caused by the assimilation of portions of the surrounding rock.───內變質(zhì)作用由于周?chē)鷰r石同化作用而在侵入火成巖內部產(chǎn)生的變化

53 、In the high-resolution seismic profile,to directly identify the diapir is often difficult due to much similarity between diapir and the invasion of igneous rock,thus leading to multi-resolution.───在高分辨率地震剖面解釋中,直接識別泥底辟構造存在一定困難,主要因為泥底辟構造和火成巖侵入體在形態(tài)上十分相似,容易造成解釋的多解性。

54 、Because they have been extruded or pored out on the earth's surface, igneous rocks from volcanoes are called extrusive igneous rocks.───因為這種火山巖是熔巖噴出地球表面而形成的，所以稱(chēng)之為噴出巖。

55 、R.Schmidt?Descriptive Nomenclature &Classification of Pyroclastic Deposits &Fragments?Recomendation of IUGS Subcommision on the Systematics of Igneous Rocks?Geology?Vol.9?5?1981.───孫善平?國內外火山碎屑巖的分類(lèi)、命名、歷史及現狀?《地球科學(xué)》?卷12?6?1987。

56 、Igneous, metamorphic and sedimentary rocks are all featured including basalt, breccia, chert, gneiss, granite, limestone and pumice.───對火成巖、變質(zhì)巖以及沉積巖（包括玄武巖、黑硅石、片麻巖、花崗巖、石灰石、浮石）作了更為詳細的說(shuō)明。

57 、Patterns in Nature: Lava Cooled pahoehoe Hawaiian lava solidifies into igneous rock with a ropelike pattern.───意譯：熔巖在自然界的模式。水冷式pahoehoe夏威夷火山熔巖凝固成火成巖與ropelike格局。

58 、LOVE the twist and turn of the rock patterns and the different shades of the igneous rocks. Yes, volcanic rocks.───我愛(ài)這曲折的外形和火巖的不同陰影,是的,它是火山巖.

59 、The characters of heterogeneity widely exist in shaly sand, carbonate and igneous reservoirs.───儲集層的非均質(zhì)性質(zhì)普遍存在于砂泥巖儲層、碳酸鹽巖和火成巖儲層中。

60 、The most common intrusive in the order of igneous rocks is granite.───在火成巖系列中最常見(jiàn)的侵入體是花崗巖。

61 、Any of a group of chemically and physically related aluminum silicate minerals,common in igneous and metamorphic rocks,characteristically splitting into flexible sheets used in insulation and electrical equipment.───云母化學(xué)上和物理上有聯(lián)系的鋁硅酸鹽礦物群的總稱(chēng)，常見(jiàn)于火成巖和變質(zhì)巖中，以易裂成柔軟的薄片為特征，用于絕緣體及電氣設備中。

62 、It is very important to distinguish the different structure of igneous for subsequent estimation of reservoir rock and fracture.───區別不同結構的火山巖對于后續的油氣儲層評價(jià)、裂縫發(fā)育情況估計是十分重要的。

63 、Of or relating to igneous rock that is forced while molten into cracks or between other layers of rock.───形成侵入巖的屬于或關(guān)于融入巖石裂縫或巖層之間時(shí)直接生成火成巖的

64 、The buried karstification can be divided into three stages and are distributed in areas where faulted structural belts and igneous rocks are well developed.───埋藏巖溶主要存在3期, 在斷裂構造帶及火成巖區較為發(fā)育。

65 、The authors have studied the formation period of the NS-trending fault, and also analyzed the geological significance of this fault in controlling igneous rocks and the strike of the tectonic line.───推斷了該斷裂的形成時(shí)期，并就這條斷裂對火成巖及構造走向的控制作用、地質(zhì)意義進(jìn)行了分析。

66 、Igneous lithology is the base of dividing lithofacies and studying on accumulation space types and growth history.───摘要火山巖巖性是劃分巖相、研究?jì)臻g類(lèi)型及發(fā)育規律的基礎。

67 、Wu, F.-C. Yang, H.-Y. and Chou, T.-F. (1983) Petrography of the igneous rocks beneath the Chiayi coastal plain, central western Taiwan. Petroleum Geology of Taiwan, 19, 77-91.───巫奉鈔、楊宏儀、周定芳(1983)臺灣中西部嘉義濱海平原井下火成巖之巖石學(xué)研究。臺灣石油地質(zhì)，第19號，第77-91頁(yè)。

68 、Known as an igneous intrusion, the 1,267-foot-tall (386-meter-tall) Devils Tower in Wyoming formed when molten rock intruded into the existing rocks.───坐落在懷俄明州的1267英尺（386米）高的魔鬼塔，是熔巖侵入到先存的巖石中形成的，也就是我們知道的侵入巖。

69 、The relation between tensional and compressive shove, normal and reverse drag, shove fault and the action of igneous rocks are ...───分析了張性走滑與壓性走滑、正牽引與逆牽引、走滑斷層與火成巖活動(dòng)的關(guān)系。這些認識,對勝利油區潛山的勘探引發(fā)了新的思考。

70 、Of or relating to the oldest known rocks, those of the Precambrian era, that are predominantly igneous in composition.───太古代的所知的最古的前寒武紀時(shí)代巖石，其組成成分主要為火成巖的，或與之相關(guān)的

71 、It is proposed that the material source of this deposit is melanic intermediate igneous rock,whic...───在沉積后，粘土礦物隨著(zhù)埋藏深度的加大，致使粘土礦物發(fā)生轉化。

72 、Igneous reservoir is a special type of hydrocarbon reservoir and has strict reservoir conditions.───摘要火成巖油氣藏作為特殊的油氣藏，儲集條件特殊而且嚴格。

73 、And its beam, it penetrates the igneous rock of ignorance.─── 它的光芒能夠穿透 無(wú)知的火山巖

74 、A mass of igneous rock intruded between layers of sedimentary rock, resulting in uplift.───巖蓋一種侵入沉積巖巖層之間的火成巖，它會(huì )產(chǎn)生隆起

75 、Igneous rock that has solidified beneath the earth's surface.───已經(jīng)在地表凝固的火成巖。

76 、A mass of igneous rockfilling the vent of a volcano.───巖頸填滿(mǎn)一座火山的一塊火成巖。

77 、See Yao Ming is not lukewarm only not igneous ground hangs whistle on the neck, single hand is holding basketball in both hands, among the two teams children that take cut of shorter than him most.───只見(jiàn)姚明不溫不火地把口哨掛在脖子上，單手捧著(zhù)籃球，走到比他矮大半截的兩隊孩子們中間。

78 、The heat and pressure from igneous intrusion cause the alteration of surrounding rocks.───入侵巖漿的熱能和壓力導致了圍巖的變化。

79 、The igneous rock of Tertiary and oil and gas reservoir generated by igneous rock in Bahai Bay basin are studied.───對渤海灣盆地第三系火成巖 (侵入巖、噴出巖和火山碎屑巖 )的分布及其油氣成藏規律進(jìn)行了分析。

80 、This paper describes the technique employed in searching for concealed igneous rock (ore) bodies in metallic ore districts and the achievements gained.───摘要提供了地震勘探方法在金屬礦區尋找隱伏火成巖（礦）體的應用技術(shù)和地質(zhì)成果。

81 、The two most common types of igneous rocks are granite and basalt.───兩種最普遍的火成巖是花崗巖和玄武巖。

82 、A crystal foreign to the igneous rock in which it occurs.───捕獲晶在火成巖內部形成的外來(lái)晶體

83 、The rock that the lava condensation that alleged igneous rock is subterranean magma or volcanic gush excessive crystallizes and becomes.───所謂火成巖就是地下巖漿或火山噴溢的熔巖冷凝聚晶而成的巖石。

84 、A rock fragment foreign to the igneous mass in which it occurs.───捕虜體指在火成巖中形成的外來(lái)巖石碎片

二級層序特征

3.2.1.1 Es4（沙河街組四段）二級層序特征

該層序底界面為二級層序的區域不整合面SSB1，頂界面為**層序界面區域性不整合面SSB2，時(shí)間寬度大約8Ma。該層序是在盆地晚期初始裂陷幕，氣候由極干旱轉向濕潤，盆地屬于閉流條件下沉積而成。從早到晚發(fā)育了干鹽湖、濱湖、沖積扇及半成水淺湖為主的沉積。在該層序內發(fā)育有SQ1和SQ2兩個(gè)層序。SQ1層序介形類(lèi)發(fā)育Cyprinotusigneous（火紅美心介）組合，孢粉發(fā)育麻黃粉屬-小榆粉孢粉組合，Sr/Ba＞1為波動(dòng)高值。主要發(fā)育沖積扇、河流或淺湖碎屑沉積，主要由沖積紅層和辮狀河道組成。其巖石組合以發(fā)育紫紅色泥巖、粉砂巖夾鹽巖、石膏為主，屬于干旱鹽湖環(huán)境。SQ2層序介形蟲(chóng)發(fā)育Austrocyprislevis（南星介）和Chinocythere sp.（華花介）組合，Sr/Ba＜1，Fe/Mn＜0.5，均為穩定低值，主要發(fā)育扇三角洲、半深-淺湖以及位于層序頂部的干鹽湖等沉積相類(lèi)型，發(fā)育大量的鹽巖膏質(zhì)泥巖和含膏泥巖。因此，SQ1層序發(fā)育期屬于干鹽湖沉積，SQ2層序屬于淺湖沉積，這兩種環(huán)境其層序體系域構成和沉積體系展布各異。沙四沉積末期，構造運動(dòng)使湖盆基底抬升，基準面下降，凹陷邊緣局部地區遭受剝蝕，與上覆地層形成區域性不整合，形成SSB2層序界面。

3.2.1.2 Es3—E（沙河街組三段—沙河街組二段下部）二級層序特征

該層序底界面為區域性不整合面SSB2，頂界面為區域性不整合面SSB3。該層序形成于裂陷伸展幕。其介形蟲(chóng)主要發(fā)育Huabeiniachineusis（中國華北介）組合、Camarocrypriselliptical（橢圓拱星介）組合、腹足類(lèi)主要產(chǎn)Valvata cincinna applanata（扁平高盤(pán)螺組合）、孢粉類(lèi)主要產(chǎn)Quercoidites microhenrici（小亨氏櫟粉）組合；其沉積體系主要發(fā)育水下扇、扇三家洲、濁積扇以及湖泊沉積體系。由此可見(jiàn)，該層序發(fā)育在潮濕溫暖氣候環(huán)境下的開(kāi)闊敞流淡水湖泊，內部發(fā)育有SQ3、SQ4、SQ5三個(gè)層序，它們均屬于裂陷伸展形層序，該層序為東營(yíng)凹陷發(fā)育的主旋回沉積，氣候逐漸變潮濕，北部陡坡帶發(fā)育多種沉積體系類(lèi)型，包括沖積扇、扇三角洲、辮狀河三角洲、水下扇、深水湖泊與滑塌濁積扇沉積體系，該層序下部主要發(fā)育一套灰色泥巖夾砂巖、油頁(yè)巖及炭質(zhì)泥巖沉積，反映了快速沉降的饑餓型深湖-半深湖沉積。上部為灰色泥巖與砂巖互層，夾含礫砂巖、油頁(yè)巖，分布范圍較小，反映了沉降速率較慢的濱淺湖、三角洲沼澤平原沉積。該層序沉積末期，由于構造抬升，形成了區域性不整合，形成了層序界面SSB3。

地質(zhì)學(xué)家根據巖石的成因，把巖石分為什么三類(lèi)

巖漿巖、沉積巖、變質(zhì)巖三大類(lèi)

巖石是天然產(chǎn)出的，由一種或多種礦物(部分為火山玻璃物質(zhì)、膠體物質(zhì)、生物遺體) 組成的固態(tài)集合體，是地球內力和外力地質(zhì)作用的產(chǎn)物。根據成因，巖石劃分為巖漿巖、沉積巖、變質(zhì)巖三大類(lèi)。

巖石可以按照其成因分為三大類(lèi)，但由于自然界是連續體，很難真正依據我們的分類(lèi)分成三種巖性，因此會(huì )存在一些過(guò)渡性的巖石，好比說(shuō)凝灰巖（火山灰塵與巖塊落入地表或水中堆積膠結而成）就可能被歸于沉積巖或火成巖，但大抵我們還是可以分為主要的三大類(lèi)：沉積巖占地表的66%，為地表的主要巖類(lèi)。由原來(lái)已形成的巖石，受到風(fēng)化作用后變?yōu)樗樾?，或由生物的遺跡等，再經(jīng)過(guò)侵蝕、沉積、及石化等作用而造成的巖石。這類(lèi)巖石都成層狀，最先沉積者在下部，時(shí)代較老，層次愈上者，則時(shí)代愈新，這叫做疊置層法則。當巖石沉積的時(shí)候往往含有生物的遺骸埋沒(méi)后?？梢酝旰帽４鏆v久就變成化石；在火成巖中則多無(wú)化石存在。