#geologia
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babyfoxcollectionthings · 22 hours ago
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cientirinhas · 5 months ago
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emvisual · 11 months ago
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Que en Islandia hay volcanes no es nada nuevo. Lo nuevo son las fotos y vídeos que hay de ellos. Estas imágenes son de la última erupción.
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galswintha · 1 year ago
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It's official! Skalickie Skałki (Skalice Rocks) confirmed as the oldest rock outcrop in entire Poland. Made of sillimanite gneisses they were said to be even a billion years old, but current estimations are closer to 600 mln yrs.
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grapeagata · 1 year ago
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it's so sad that rocks look so tasty they look like candy but they hurt to bite😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥😥
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camblorite · 2 months ago
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Twinned staurolite in thin section
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andy-paleoart · 9 months ago
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The first land plants arise! | O surgimento das primeiras plantas terrestres!
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As a paleobotanist, this is my favorite part.
At the onset of the Late Ordovician, Earth's continents were clustered near the South Pole in a supercontinent known as Gondwana. The climate was generally warm, and the sea levels were high, creating extensive shallow marine environments. It is within this dynamic context that the first land plants began to evolve.
Early land plants are thought to have originated from green algae, adapting to life on land over millions of years. Fossil evidence suggests that the first land plants were simple and lacked complex vascular tissues. These primitive plants were likely small and inconspicuous, resembling modern-day liverworts, mosses, and algae.
The transition from aquatic to terrestrial life posed several challenges for these early plants. They had to develop adaptations to cope with the harsh conditions of land, such as desiccation, ultraviolet radiation, and the absence of a buoyant aquatic environment. Over time, these plants evolved various structures, such as cuticles to retain water, rhizoids for anchorage, and sporangia for reproductive purposes.
The colonization of land by plants during the Late Ordovician had profound implications for Earth's ecosystems. As plants gained a foothold on land, they contributed to the development of soil, altered local climates, and provided new habitats for other organisms. Additionally, the process of photosynthesis by land plants had a significant impact on atmospheric composition, leading to changes in oxygen and carbon dioxide levels.
While the Late Ordovician marks the initial steps of land plant evolution, it was in subsequent periods, such as the Silurian and Devonian, that more diverse and complex plant forms emerged. The evolution of land plants played a crucial role in shaping Earth's ecosystems and paved the way for the establishment of terrestrial life as we know it today.
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Como paleobotânica, essa é minha parte favorita.
No início do Ordoviciano Tardio, os continentes da Terra estavam agrupados perto do Polo Sul em um supercontinente conhecido como Gondwana. O clima era geralmente quente, e os níveis do mar estavam altos, criando ambientes marinhos rasos extensivos. É dentro desse contexto dinâmico que as primeiras plantas terrestres começaram a evoluir.
Acredita-se que as primeiras plantas terrestres tenham se originado a partir de algas verdes, adaptando-se à vida em terra ao longo de milhões de anos. Evidências fósseis sugerem que essas primeiras plantas eram simples e careciam de tecidos vasculares complexos. Provavelmente, eram pequenas e pouco perceptíveis, assemelhando-se às atuais hepáticas, musgos e algas.
A transição da vida aquática para a vida terrestre apresentou vários desafios para essas primeiras plantas. Elas tiveram que desenvolver adaptações para lidar com as condições adversas da terra, como a dessecação, radiação ultravioleta e a ausência de um ambiente aquático e flutuante. Com o tempo, essas plantas evoluíram diversas estruturas, como cutículas para reter água, rizoides para ancoragem e esporângios para fins reprodutivos.
A colonização da terra por plantas durante o Ordoviciano Tardio teve implicações profundas nos ecossistemas da Terra. À medida que as plantas conquistavam a terra, contribuíam para o desenvolvimento do solo, alteravam os climas locais e forneciam novos habitats para outros organismos. Além disso, o processo de fotossíntese pelas plantas terrestres teve um impacto significativo na composição atmosférica, levando a mudanças nos níveis de oxigênio e dióxido de carbono.
Embora o Ordoviciano Tardio marque os passos iniciais da evolução das plantas terrestres, foi em períodos subsequentes, como o Siluriano e Devoniano, que formas de plantas mais diversas e complexas surgiram. A evolução das plantas terrestres desempenhou um papel crucial na formação dos ecossistemas da Terra e abriu caminho para o estabelecimento da vida terrestre como a conhecemos hoje.
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vizcart · 10 months ago
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As announced, a new map has been added to the European collection.
We had started this paper years ago, but it had never been finalized. Since we didn't even have a dedicated map of Switzerland yet, we thought it was appropriate to remediate!
This is a geotectonic map of Switzerland that among the authors also has Imhof. It was realized in 1972 but published in 1978 inside the Atlas of Switzerland.
You can find the original sheet in the David Rumsey Map Collection.
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nasze-zd · 4 months ago
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Castlepoint Reef
Skała z latarnią w Castlepoint to nie jedyny popularny widok do sfotografowania tam; drugim przykuwającym wzrok miejscem jest Castle Rock: stupíęćdzięsięciometrowe wzgórze, a właściwie jego resztki. Z lądem łączy je krótki, wysunięty w morze grzbiet wystrzelający nagle w górę stromym trawiastym stokiem, po czym spadający jeszcze ostrzej, pionowym urwiskiem prosto w huczące fale Pacyfiku.
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Castle Rock
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Castle Rock, fragment
Castle Rock jest najwyższym punktem wynurzającej się z oceanu grzędy skalnej i jej drugim końcem, przeciwnym do tego, na którym stoi latarnia. Cała ta dwukilometrowej długości formacja, o bardzo zmiennej wysokości i poprzerywana w kilku miejscach niszczącymi siłami wody, nazywana jest Castlepoint Reef.
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Geologicznie miejsce to jest aktywnym uskokiem tektonicznym; szybciej się wypiętrza, niż jest niszczone przez ocean. Jest też rafą w sensie skały przybrzeżnej, jednak nie koralową. Dominującymi utworami są młode, dwumilionoletnie zlepieńce muszlowe (ang. coquina, shell limestone) o genezie podobnej do wapieni, ale nie posiadające ich jednorodnej tekstury. W licznych ich odsłonach możemy dostrzec, że składają się niemal wyłącznie z fragmentów lub całych muszli różnych wielkości. Są też słabo scementowane.
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overdoso · 2 days ago
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Durante as primeiras investigações do Meteorito Lafayette, cientistas descobriram que ele interagiu com água líquida enquanto estava em Marte. Cientistas há muito se perguntam quando essa interação com água líquida ocorreu. 🔭
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savvynature · 5 days ago
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babyfoxcollectionthings · 4 months ago
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lunechaude · 3 months ago
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algum livro sobre geologia
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emvisual · 2 months ago
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Os acordáis de Encuentros en la tercera fase, una más de las empalagosas películas de Steven Spielberg. Es la columna de basalto conocida como la Torre del Diablo en Wyoming.
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noneun · 1 year ago
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Non mi dilungherò nel sottolineare l'ennesima contraddizione ed ipocrisia di una strenua difenditrice (anzi, strenuo difensore) della famiglia tradizionale. Nemmeno il tempismo con il quale due strade "divise da tempo" abbiano portato proprio ora alla fine della relazione. E, nemmeno sull'opportunità di tirare in ballo figlia e padre (ma, su i figli, Salvini docet).
Piuttosto sottolineerò la grossa risata che mi sono fatto leggendo "Non ho altro da dire" seguito da "post scriptum".
Seguita purtroppo dalla grossa sofferenza causata dal contenuto del post scriptum stesso. Cioè, veramente. Ma come accidenti si fa a scrivere una sesquipedale cazzata del genere, sbagliata da ogni punto di vista: intere catene montuose sono diventate polvere a causa dell'acqua, ma di cosa parliamo.
E vabbè, da politici abituati dalla mattina alla sera a sparare cazzate non si può certo pretendere un post geologicamente corretto...
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galswintha · 1 year ago
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Bagieniec village lies on the line of the Tertiary Bagieniec-Paszowice fault, which is the north-western border of the Strzegom - Sobótka granite massif. Strzelnica hill, towering over the village, is the raised wing of this fault, built of the Paleozoic granite intrusion of Carboniferous age. The depressed part in which Bagieniec is located belongs to the Roztoka-Mokrzeszów Graben, filled with sediments of the Tertiary and Quaternary period.
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The outcrops of Strzelnica hill show granite rocks called the Strzegom granite and products of their weathering.
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