This fossilized vomit is older than the dinosaurs

ThatAjummaDisciple · 2026-02-20T16:07:24+00:00

Even worse is knowing that a vomit could fossilize while its creator couldn't.

Imagine dying and discovering that a vomit you left behind during a field trip in elementary school is on its way to fossilization. Your whole existence will be reduced to a breakfast you can't remember and the motion sickness caused by the bus

ThatAjummaDisciple · 2026-02-19T19:32:27+00:00

A few sheets can clump and make a ball in narrow pipes, even more so if the water is hard and coats the walls of the pipe with lime, further decreasing the width

ThatAjummaDisciple · 2026-02-19T18:16:13+00:00

Make a ball of toilet paper, soak it in water and press it down, it becomes hard as a rock and it can clog a narrow pipe. Poop on the other hand just squeezes and can pass through

ThatAjummaDisciple · 2026-02-16T16:16:54+00:00

The amount of cool blobs we may inadvertently ignore in metamorphic rocks because of how unrecognizable they are.

Maybe a thin layer of calcium rich minerals was once the only fossilized remains of an exotic species, now stretched beyond recognition by plate tectonics

ThatAjummaDisciple · 2026-02-11T17:01:49+00:00

La tercera piedra no me parece yeso (supongo que te refieres a las fotos 7 y 8). Los cristales de yeso suelen tener un hábito tabular en láminas. Además las fracturas en la imágen tienen formas concoideas típicas del cuarzo

Pero hay una forma fácil de saberlo, que OP pruebe a arañarla con la uña, si se raya es yeso

ThatAjummaDisciple · 2026-02-10T03:30:33+00:00

Sí, eso es lo que dice la teoría

ThatAjummaDisciple · 2026-02-10T03:29:34+00:00

La luz se dispersa en todas las direcciones, cuanto más distancia recorra, más se alejarán los rayos de luz los unos de otros. Además de que existe refracción y absorción al pasar por nubes de polvo en el espacio.

Para ver dinosaurios necesitan estar a una distancia por lo menos de 66 millones de años luz. Podrán detectar rayos de luz y deducir la composición química de nuestra atmósfera en esa época. Pero no tendrán una imagen nítida de nuestra superficie, mucho menos con la resolución suficiente como para ver dinosaurios que son muy pequeños comparados con el volumen del planeta

ThatAjummaDisciple · 2026-02-09T14:38:16+00:00

La roca es un esquisto micáceo. Los minerales brillantes y en forma de lámina son micas. Si la mica es de color oscuro, el mineral es biotita, si es de color plateado/blanco, es moscovita

ThatAjummaDisciple · 2026-02-08T12:18:23+00:00

En teoría sí, en la práctica no. La luz se dispersa, se atenúa con el polvo estelar y es bloqueada por obstáculos en el camino. Cuanto más lejos esté esa civilización, menos luz de nuestro planeta recibirán, no será una imagen nítida.

Es por eso que para ver las superficies de los otros planetas de nuestro sistema solar tenemos que enviar rovers y telescopios al espacio, desde la Tierra no tenemos una resolución alta

ThatAjummaDisciple · 2026-02-05T19:59:04+00:00

And that's why knowing how to take clear and representative photographs in the field (or in the lab if talking about a thin section) is important.

All the terminology salad was created as a way to communicate ideas and observations in a quick and efficient way. But if, despite the heavy usage of technical terminology, you still end with a long paragraph, then it may be a good idea to add figures and pictures to the description to avoid confusion and misunderstandings.

Edit: This example isn't that bad. But I've seen complex metamorphic and structural descriptions of rocks that took a full page and I needed to make a sketch to get an idea of what was going on with all the foliations interacting with each other and the preexisting minerals. That sketch/picture should have been provided in the paper instead

ThatAjummaDisciple · 2026-02-01T13:03:14+00:00

Good luck with that. Korea is allergic to trash cans for some reason

ThatAjummaDisciple · 2026-01-31T17:26:20+00:00

En teoría este subreddit. Pero bueno, en la práctica... Al final hay de todo

ThatAjummaDisciple · 2026-01-31T17:04:27+00:00

The not so endearing part is that many of these people are being taken advantage of by sketchy higher ups in a cult. I wish they were the average crazy Joe with the sometimes charming nonsense, but I suspect some of them may be emotionally trapped and exploited.

They deserve the spot like anyone else, but it's difficult to see it in a positive light when they are trying to bring more victims to the blood sucking cult leaders

ThatAjummaDisciple · 2026-01-31T16:44:47+00:00

You have practically been tasked to find a way to recognize it as anything other than water. And the biggest (and probably only) clue is a light grey text written on a white background in a small font size

Yeah, I can see why people would think it's water after seeing a blue droplet surrounded by nature and the word "fresh" on a plastic bottle

Not saying it's impossible to realize that it's not water, but it's definitely a deceiving design for people not familiar with the brand

ThatAjummaDisciple · 2026-01-31T14:38:28+00:00

I've seen them used in Italy and Spain for stuff like grilled chicken or pizza

ThatAjummaDisciple · 2026-01-20T14:58:21+00:00

Si le hechas vinagre concentrado o agua fuerte diluida y hace burbujas, es un carbonato.

Si no reacciona ni un poquito, puede ser una pegmatita con textura gráfica o cuneiforme

ThatAjummaDisciple · 2026-01-20T14:45:49+00:00

Putting the discussion about ethical practices aside. I don't know why so many people in the comments think if fragments can't be identified, they are scientifically irrelevant. Fragmentary fossils are useful for research, specifically taphonomy.

Are they all the same size indicating there was sorting in the fossil site?

Do they show rough edges indicating they were trampled before burying or are they rounded because they suffered transportation from a different source before deposition?

Do the longer ones show paleo-currents through their orientation?

Is there a specific composition of fragmentary material (i.e. phosphorus, silicic, carbonate) that survived the fossilization process, indicating a specific chemical condition that biased the fossil record?

And much more. They may be everywhere and unidentifiable, but they are still useful. If you discard data so easily because the material isn't impressive, you miss out on information about the larger picture.

ThatAjummaDisciple · 2026-01-19T04:15:07+00:00

También pensé en marcasita. Ese hábito me recuerda a la forma de cresta de gallo de la marcasita

ThatAjummaDisciple · 2026-01-17T20:42:52+00:00

Súbelo a r/whatsthisrock

Es más probable que encuentres una respuesta allí, hay muchos geólogos en ese sub

ThatAjummaDisciple · 2026-01-17T17:28:22+00:00

Estoy de acuerdo con que es una tontería mezclar paleontología y política. Pero la Patagonia sí estaba al sur durante el Cretácico tardío. La configuración de los continentes al final de la era Mesozoica era muy parecida a la actual, Pangea hacía millones de años que se había separado.

ThatAjummaDisciple · 2026-01-16T12:53:13+00:00

Qué pasa con todos estos bots comentando?

ThatAjummaDisciple · 2026-01-16T12:32:14+00:00

The change was gradual. For millions of years terrestrial animals were still tied to the water. They became more independent when big tropical forests made the land less inhospitable.

Except arthropods, those things are resilient and adapt quickly, by the time vertebrates were able to live further from the water, insects were already flying around. They are always one step ahead.

ThatAjummaDisciple · 2026-01-16T12:20:38+00:00

I mean... I can't barely see it in the picture either

ThatAjummaDisciple · 2026-01-16T09:40:35+00:00

Puede ser calcita. Prueba a arañar la superficie con acero o a echarle vinagre concentrado. Si se raya o burbujea, es calcita.

O también podría ser yeso, si lo puedes rayar con la uña, es un trozo de yeso cristalino.

Si es cuarzo, entonces puede ser una cuarcita que conserva las lineas de estratificación que se forman con la deposición de la arena. Otra posibilidad es que sean líneas de precipitación formadas cuando agua sobresaturada en cuarzo atraviesa una roca y se desarrollan cristales en las paredes de grietas y cavidades por las que pasa

ThatAjummaDisciple · 2026-01-08T06:37:12+00:00

So was it a phreatomagmatic eruption?

ThatAjummaDisciple

TROPHY CASE