Think back to all of your relationships. They all started and developed relatively the same, right? Well, they should have. A relationship timeline - no matter who you date - should be relatively similar. Each relationship goes through different stages at different times. And while some couples can stay in certain phases for longer than others, they still go through the same timeline. Your relationship will never be the same as it was when you first began dating.
Time measurement and standards. Chronometry Orders of magnitude Metrology. Ephemeris time Greenwich Mean Time Prime meridian.
Absolute space and time Spacetime Chronon Continuous signal Coordinate time Cosmological decade Discrete time and continuous time Planck time Proper time Theory of relativity Time dilation Gravitational time dilation Time domain Time translation symmetry T-symmetry.
Chronological dating Geologic time scale International Commission on Stratigraphy. Galactic year Nuclear timescale Precession Sidereal time. Big History. Big History series. Periods Eras Epochs.
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Lunisolar Solar Lunar Astronomical year numbering. Deep time Geological history of Earth Geological time units. Chronostratigraphy Geochronology Isotope geochemistry Law of superposition Luminescence dating Samarium-neodymium dating.
Amino acid racemisation Archaeomagnetic dating Dendrochronology Ice core Incremental dating Lichenometry Paleomagnetism Radiometric dating Radiocarbon Uranium-lead Potassium-argon Tephrochronology Luminescence dating Thermoluminescence dating. Fluorine absorption Nitrogen dating Obsidian hydration Seriation Stratigraphy. Molecular clock. Atmosphere of Earth Climate Global warming Weather.
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Wikimedia Commons. Cenozoic [e]. Bronze Age. Current interglacial begins. Sea level flooding of Doggerland and Sundaland. Sahara desert forms. Neolithic agriculture. Late ' Tarantian '. Eemian interglacialLast glacial perio ending with Younger Dryas. Toba eruption. Megafauna extinction. High amplitude ka glacial cycles. Rise of Homo sapiens. Further cooling of the climate. Spread of Homo erectus. Start of Quaternary glaciations. Rise of the Pleistocene megafauna and Homo habilis.
Greenland ice sheet develops. Zanclean flooding of the Mediterranean Basin. Cooling climate. Ardipithecus in Africa. Messinian Event with hypersaline lakes in empty Mediterranean Basin. Moderate Icehouse climatepunctuated by ice ages and re-establishment of East Antarctic Ice Sheet ; Gradual separation of human and chimpanzee ancestors. Sahelanthropus tchadensis in Africa.
Warmer during middle Miocene climate optimum. Orogeny in Northern Hemisphere. Widespread forests slowly draw in massive amounts of CO 2gradually lowering the level of atmospheric CO 2 from ppmv down to around ppmv during the Miocene. Horses and mastodons diverse. Grasses become ubiquitous. Ancestor of apesincluding humans. Grande Coupure extinction.
Start of widespread Antarctic glaciation. Major evolution and dispersal of modern types of flowering plants. Moderate, cooling climate. Archaic mammals e. Creodonts" Condylarths ", Uintatheresetc. Appearance of several "modern" mammal families.
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Primitive whales diversify. Orogeny of the Alps in Europe begins. Hellenic Orogeny begins in Greece and Aegean Sea. The Azolla event decreased CO 2 levels from ppm to ppm, setting the stage for a long period of cooling. Starts with Chicxulub impact and the K-Pg extinction event. Climate tropical. Modern plants appear; Mammals diversify into a number of lineages following the extinction of the non-avian dinosaurs. First large mammals up to bear or small hippo size.
Alpine orogeny in Europe and Asia begins. Flowering plants proliferate, along with new types of insects. More modern teleost fish begin to appear. Ammonoideabelemnitesrudist bivalvesechinoids and sponges all common. Many new types of dinosaurs e. TyrannosaursTitanosaursHadrosaursand Ceratopsids evolve on land, as do Eusuchia modern crocodilians ; and mosasaurs and modern sharks appear in the sea. Birds toothed and toothless coexist with pterosaurs.
Monotremesmarsupials and placental mammals appear. Break up of Gondwana. Gymnosperms especially conifersBennettitales and cycads and ferns common.
Many types of dinosaurssuch as sauropodscarnosaursand stegosaurs. Mammals common but small. First birds and lizards. Ichthyosaurs and plesiosaurs diverse. BivalvesAmmonites and belemnites abundant. Sea urchins very common, along with crinoidsstarfish, spongesand terebratulid and rhynchonellid brachiopods. Breakup of Pangaea into Gondwana and Laurasia. Nevadan orogeny in North America. Rangitata and Cimmerian orogenies taper off.
Atmospheric CO 2 levels times the present day levels - ppmv, compared to today's ppmv  [f]. Archosaurs dominant on land as dinosaurs and in the air as pterosaurs. Ichthyosaurs and nothosaurs dominate large marine fauna. Cynodonts become smaller and more mammal-like, while first mammals and crocodilia appear.
Dicroidium flora common on land. Many large aquatic temnospondyl amphibians. Ceratitic ammonoids extremely common. Modern corals and teleost fish appear, as do many modern insect clades. Andean Orogeny in South America. Cimmerian Orogeny in Asia. Rangitata Orogeny begins in New Zealand. Landmasses unite into supercontinent Pangaeacreating the Appalachians. End of Permo-Carboniferous glaciation. Synapsids including pelycosaurs and therapsids become plentiful, while parareptiles and temnospondyl amphibians remain common.
In the mid-Permian, coal -age flora are replaced by cone -bearing gymnosperms the first true seed plants and by the first true mosses. Beetles and flies evolve. Marine life flourishes in warm shallow reefs; productid and spiriferid brachiopods, bivalves, foramsand ammonoids all abundant. Ouachita and Innuitian orogenies in North America.
Altaid orogeny in Asia. Hunter-Bowen Orogeny on Australian continent begins c. Carbon- iferous [g].
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Winged insects radiate suddenly; some esp. Protodonata and Palaeodictyoptera are quite large. Amphibians common and diverse. First reptiles and coal forests scale treesferns, club treesgiant horsetailsCordaitesetc. Highest-ever atmospheric oxygen levels. Goniatitesbrachiopods, bryozoa, bivalves, and corals plentiful in the seas and oceans. Testate forams proliferate. Uralian orogeny in Europe and Asia.
Variscan orogeny occurs towards middle and late Mississippian Periods. Large primitive treesfirst land vertebratesand amphibious sea-scorpions live amid coal -forming coastal swamps. Lobe-finned rhizodonts are dominant big fresh-water predators. In the oceans, early sharks are common and quite diverse; echinoderms especially crinoids and blastoids abundant.
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Coralsbryozoagoniatites and brachiopods ProductidaSpiriferidaetc. Glaciation in East Gondwana. Tuhua Orogeny in New Zealand tapers off. First clubmosseshorsetails and ferns appear, as do the first seed -bearing plants progymnospermsfirst trees the progymnosperm Archaeopterisand first wingless insects.
Strophomenid and atrypid brachiopodsrugose and tabulate corals, and crinoids are all abundant in the oceans. Goniatite ammonoids are plentiful, while squid-like coleoids arise. Trilobites and armoured agnaths decline, while jawed fishes placodermslobe-finned and ray-finned fish, and early sharks rule the seas. First tetrapods still aquatic. First vascular plants the rhyniophytes and their relativesfirst millipedes and arthropleurids on land.
First jawed fishesas well as many armoured jawless fishpopulate the seas. Sea-scorpions reach large size. Tabulate and rugose corals, brachiopods PentameridaRhynchonellidaetc. Trilobites and mollusks diverse; graptolites not as varied. Also continued into Devonian period as the Acadian Orogenyabove.
Taconic Orogeny tapers off. Lachlan Orogeny on Australian continent tapers off. Invertebrates diversify into many new types e. Early coralsarticulate brachiopods OrthidaStrophomenidaetc.
Conodonts early planktonic vertebrates appear. First green plants and fungi on land. Ice age at end of period. Floian formerly Arenig. Stage Major diversification of life in the Cambrian Explosion. Numerous fossils; most modern animal phyla appear. First chordates appear, along with a number of extinct, problematic phyla. Reef-building Archaeocyatha abundant; then vanish. Trilobitespriapulid worms, spongesinarticulate brachiopods unhinged lampshellsand numerous other animals.
Anomalocarids are giant predators, while many Ediacaran fauna die out.
Prokaryotesprotists e. Gondwana emerges. Petermann Orogeny on the Australian continent tapers off - Ma.
Ross Orogeny in Antarctica. Delamerian Orogeny c. Atmospheric CO 2 content roughly 15 times present-day Holocene levels ppmv compared to today's ppmv  [f].
Series 2. Stage 4. Stage 3. Stage 2. Precambrian [h]. Proterozoic [i].
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Neoproterozoic [i]. Good fossils of the first multi-celled animals. Ediacaran biota flourish worldwide in seas. Simple trace fossils of possible worm-like Trichophycusetc. First sponges and trilobitomorphs. Enigmatic forms include many soft-jellied creatures shaped like bags, disks, or quilts like Dickinsonia.
Taconic Orogeny in North America. Aravalli Range orogeny in Indian Subcontinent. Beginning of Petermann Orogeny on Australian continent. Beardmore Orogeny in Antarctica, - Ma. Possible " Snowball Earth " period. Fossils still rare.
Rodinia landmass begins to break up. Rodinia supercontinent persists. Sveconorwegian orogeny ends. Trace fossils of simple multi-celled eukaryotes. First radiation of dinoflagellate -like acritarchs. Grenville Orogeny tapers off in North America.
Pan-African orogeny in Africa. Edmundian Orogeny c.
The four tables give the most commonly accepted dates or ranges of dates for the Old Testament/Hebrew Bible, the deuterocanonical books (included in Catholic Bible and Eastern Orthodox Bibles, but not in the Hebrew and Protestant Bibles) and the New Testament, including, where possible, hypotheses about their formation-history. Table I is a chronological overview. Feb 28, The geologic time scale is a system used by scientists to describe Earth's history in terms of major geological or paleontological events (such as the formation of a new rock layer or the appearance or demise of certain lifeforms). Geologic time spans are divided into units and subunits, the largest of which are eons. Sep 12, According to a survey by doursim.com, 37of people agreed that six months to a year into dating is a good time to move in together. "Moving in together is when the rubber hits the road," says Hokemeyer. "You'll need to have a good idea of how stable the tires doursim.com: Ashley Papa.
Mesoproterozoic [i]. Narrow highly metamorphic belts due to orogeny as Rodinia forms. Sveconorwegian orogeny starts.
Musgrave Orogeny c. Platform covers continue to expand. Green algae colonies in the seas. Grenville Orogeny in North America.
Platform covers expand. Paleoproterozoic [i].
First complex single-celled life : protists with nuclei, Francevillian biota. Columbia is the primordial supercontinent. Kimban Orogeny in Australian continent ends. Yapungku Orogeny on Yilgarn cratonin Western Australia. The atmosphere becomes oxygenic.
Vredefort and Sudbury Basin asteroid impacts.
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Much orogeny. Early Ruker Orogeny in Antarctica, 2,-1, Ma. Glenburgh Orogeny, Glenburgh TerraneAustralian continent c. Kimban Orogeny, Gawler craton in Australian continent begins. Bushveld Igneous Complex forms.
Huronian glaciation. Oxygen catastrophe : banded iron formations forms. Archean [i]. Neoarchean [i]. Stabilization of most modern cratons ; possible mantle overturn event. Abitibi greenstone belt in present-day Ontario and Quebec begins to form, stabilizes by 2, Ma. Mesoarchean [i]. First stromatolites probably colonial cyanobacteria. Oldest macrofossils. Humboldt Orogeny in Antarctica. Paleoarchean [i]. Some scientists even believe that during the Neoproterozoic era, about million years ago, the surface of the Earth became frozen.
Proponents of the "Snowball Earth" theory point to certain sedimentary deposits that are best explained by the presence of ice. The first multicellular organisms developed during the Proterozoic eon, including early forms of algae.
Fossils from this eon are very small. Some of the most notable from this time are the Gabon macrofossils, which were discovered in Gabon, West Africa. The fossils include flattened disks up to 17 centimeters long.
The most recent geologic eon is the Phanerozoic, which began about million years ago. This eon is very distinct from the previous three-the Hadean, Archean, and Proterozoic-which are sometimes known as the Precambrian era.
During the Cambrian period-the earliest part of the Phanerozoic-the first complex organisms appeared. Most of them were aquatic; the most famous examples are trilobites, small arthropods creatures with exoskeletons whose distinct fossils are still being discovered today. During the Ordovician period, fish, cephalopods, and corals first appeared; over time, these creatures eventually evolved into amphibians and dinosaurs.
Sep 14, I like this time table as a guide line. There are about million different things that could alter it. My BF and I have been together almost 4 years but almost 3 of them were long distance. His little sister is now engaged, to her BF of 18 months. The geologic time scale (GTS) is a system of chronological dating that classifies geological strata (stratigraphy) in doursim.com is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events in geologic history. The time scale was developed through the study of physical rock layers and relationships as well as the times when different.
During the Mesozoic era, which began about million years ago, dinosaurs ruled the planet. These creatures were the largest to ever walk the Earth. Titanosaur, for example, grew up to feet long, five times as long as an African elephant. The dinosaurs were eventually wiped out during the K-2 Extinction, an event that killed about 75 percent of the life on Earth.
Following the Mesozoic era was the Cenozoic, which began about 66 million years ago. This period is also known as the "Age of Mammals," as large mammals, following the extinction of the dinosaurs, became the dominant creatures on the planet.
In the process, mammals diversified into the many species still present on the Earth today.
Early humans, including Homo habilisfirst appeared about 2. These enormous changes to life on Earth have taken place over a period of time that, compared to geologic history, is relatively small.
Human activity has transformed the planet; some scientists have proposed a new epoch, the "anthropocene," to describe this new period of life on Earth. Share Flipboard Email. Andrew Alden. Geology Expert. Andrew Alden is a geologist based in Oakland, California.
He works as a research guide for the U. Geological Survey. ated February 28,