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- Continent (6440 bytes)
2: ... the Romans as [[Africa (province)|Africa]], was west of Alexandria and south of the Mediterranean.
4: ...cognized continents, from the largest to the smallest:
13: ...storians find it useful to define larger land masses connected with a [[land bridge]]:
19: ...mmonly defined than the Americas. These land masses are usually considered [[supercontinent]]s rather...
21: Because of the perceived cultural differences by the inhabitants, it is conventional to subdivi... - Plate tectonics (27764 bytes)
3: ...anic trench]] formation occur along plate boundaries (most notably around the so-called "[[Pacific Rin...
6: ...:Tectonic plates.png|thumb|380px|The tectonic plates of the world were mapped in the second half of th...
7: == Key principles ==
8: ...dity of the asthenosphere allows the tectonic plates to undergo motion in different directions.
10: ...ire]] being most active and famous. These boundaries are discussed in further detail below. - Eurasia (4541 bytes)
3: ...ns of or affairs concerning the [[post-Soviet states]].
5: ...ty of Eurasian animals and plants suitable for domesticaion.
7: ...]] relationships between European and Asian cultures of antiquity, which had long been thought of as d...
9: ...ough ''Asia'' contains multiple regions and cultures as large and populous as Europe, and as different...
11: ... much of [[South Europe]], [[South Asia]], and [[West Asia]] as historically closer to each other than... - Supercontinent (3497 bytes)
1: ...accreted terranes]] that forms [[Eurasia]] qualifies as a supercontinent today.
3: ...y such as [[history]] and [[geography]], land masses connected with an [[isthmus]] are also considered...
5: ...ercontinent, see [[Pangaea]] and its successors [[Laurasia]] and [[Gondwana]].
7: ...into the northern and southern supercontinents, [[Laurasia]] and [[Gondwana]].
11: ..., we need to pass through a few more of these cycles. - Geologic time scale (26014 bytes)
1: ...uses the standard color codes of the [[United States Geologic Survey]].
3: ...se of the [[dinosaur]]s and of many marine [[species]].
7: ... general there are far more recognized faunal stages than defined geologic time units.
9: ...[Tommotian]], [[Atdabanian]] and [[Botomian]] stages in [[East Asia]] and [[Siberia]]. It is a key as...
13: ... appearances; 3) The strata of any given area represented only part of the Earth's long history. - Ocean (6829 bytes)
6: ...y a line of [[latitude]] with no landmass boundaries.
10: ...led [[sea]]s, [[gulf]]s, [[strait]]s and other names.
12: ...he [[Strait of Gibraltar]], and indeed several times over the last few million years movement of the [...
14: ...lion km?, and its average depth is 3790 m. This does not include seas not connected to the World Ocean...
16: ...he total mass of the hydrosphere is about 1.4 × 10<sup>21</sup> kg, ca. 0.023 % of the Earth's t... - Pangaea (1625 bytes)
3: ...A]], mountains were formed, and some of these ranges still exist, such as the [[Appalachian Mountains|...
7: ...ill [[heat|hot]] and trying to rise upward. As a result, [[Africa]] sat several tens of meters higher ...
12: ...uthern part, [[Gondwana]], and a northern part, [[Laurasia]]. - Mammal classification (78467 bytes)
1: ...nt surge in interest and modification due to the results of [[molecular phylogeny|molecular phylogenet...
3: ...tion and a Classification of Mammals" ([[#References|Simpson, 1945]]) was the original source for the ...
5: ...on's classification outdated, it remained the closest thing to an official classification of mammals.
9: ...subclasses and infraclasses. This system also makes no note of the position of entirely fossil groups...
11: ...rs to see more detailed relationships among families in that order. - Kentrosaurus (4090 bytes)
12: ...ubdivision | color = pink | plural_taxon = [[Species]]}}
13: ''K. aethiopicus'' ([[type species|type]]) <br/>
19: == Description ==
21: ... much smaller weight (although no accurate estimates can yet be made) — certainly small for a [[...
23: ...used its plates for [[thermoregulation]], the spines of ''Kentrosaurus'' could only have served once p... - Eocene (7034 bytes)
1: ...the epoch are well identified, but their exact dates are slightly uncertain.
8: ...bdivisions. The Faunal stages from youngest to oldest are:
19: | [[Ypresian]]
24: ...provoked a sharp extinction event that distinguishes Eocene [[fauna]] from the ecosystems of the [[Pal...
26: [[Climate]]s remained warm through the rest of the Eocene, although slow global cooling, whi... - Mesozoic (1564 bytes)
1: ...geology)|eon]]. The division of time into Eras dates back to the [[19th century]].
3: ... extended from roughly 251 million years before present to roughly 65 million years.
6: ...et by the [[Permian extinction]]. The upper (youngest) boundary is set at the [[Cretaceous extinction]...
8: ...merica]] and [[Eurasia]]. Gondwana broke up progressively into four continents: [[South America]], [[...
10: ... of modern life were in place although in some cases—notably the mammals—the forms that ex...
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