Environmental Geology and its Scope Definition of Environmental Geology: Environmental geology is a field that applies geological knowledge to address environmental issues. Here are some of the important topics covered under environmental geology: Natural Hazards This branch of environmental geology studies the Earth’s natural hazards such as earthquakes, landslides, floods, sinkholes, and volcanoes. Environmental geologists assess the risks posed by these hazards and recommend mitigation strategies to minimize their impact on people and infrastructure. Water Resources Environmental geologists play a crucial role in managing water resources. They study groundwater flow patterns, assess water quality, and identify potential sources of contamination. They are also involved in finding solutions for sustainable water…

What is Earth Science? For thousands of years, people have looked at the world around them and wondered what forces shaped it. Throughout history, many cultures have been terrified and fascinated by seeing volcanoes erupt, feeling the ground shake during an earthquake, or watching the sky darken during an eclipse. Some cultures developed myths or stories to explain these events. In some of these myths, angry goddesses hurled fire from volcanoes, and giants shook the ground by wrestling underneath the Earth’s surface. Modern science searches for natural causes and uses careful observations to explain these same events and to understand Earth and its changing landscape. The Scientific Study of Earth…

Field Trip Lunch Ideas No Refrigeration: 9 Menus Recently, we have visited a geological trip in the mountainous areas in Southern Japan, called the Kyushu Island. There are so many active volcanoes there. We have visited in an active volcano called the Mount Unzen. The altitude is 1330m and still active. The view is spectacular and mind-blowing. We have reached the peak by a ropeway vehicle. In this article, I will discuss 10 Field Trip Ideas and Lunch menus. Basic talk before going to Field Trip Ideas: Field trips are a fantastic way to enhance the educational experience for students by taking learning outside the classroom walls. Field trip providers…

9 Field Lunch Menus Recently, we have visited a geological trip in the mountainous areas in Southern Japan, called the Kyushu Island. There are so many active volcanoes there. We have visited in an active volcano called the Mount Unzen. The altitude is 1330m and still active. The view is spectacular and mind-blowing. We have reached the peak by a ropeway vehicle. In this article, I will discuss 10 Field Trip Ideas and Lunch menus. Basic talk before going to Field Trip Ideas: Field trips are a fantastic way to enhance the educational experience for students by taking learning outside the classroom walls. Field trip providers provide a hands-on and…

What are Thrombolites and Stromatolites?   Definaiton of Thrombolites? Thrombolites are defined by the two separate parts of it Thrombolites mean “Clot” and lithos are the Stone. So thrombolites are the rocks formed in shallow marine environments due to the clotting or aggregating of microorganisms cyanobacteria. The Thrombolites are formed due to the precipitation of calcium carbonate from the marine water surrounded by that clotting. The calcification is the main process of the formation of thrombolites. Index fossil: Thrombolites are the index fossil because they indicate the age of 53 Ma of the late Paleozoic time in the geological time scale. What are Stromatolite Fossils? Get an Explanation from my YouTube…

Stromatolite fossils Stromatolite fossils What is a stromatolite?   The term “stromatolite” comes from the Greek words στρῶμα (strōma) and λίθος (lithos), meaning “layer” and “rock” respectively. Essentially, stromatolites are layered sedimentary rocks primarily shaped by microbial organisms, often exhibiting convex-up layers. However, similar structures can be formed by animals like sponges, stromatoporoids, bryozoans, and algae, causing confusion in defining stromatolites. In ancient geologic eras like the Archean and Proterozoic, stromatolites included abiogenic sparry crusts as common components, sometimes alternating with biogenic layers. This complexity raises challenges in precisely defining stromatolites.   Stromatolites, as trace fossils, document the interplay between microbial communities and sediments. Examining their microscopic details provides insights…

Correction of Gravity Measurements: Bouguer Correction, Latitude Correction, Terrain Corrections Free Air Correction Correction of Gravity Measurements: If the interior of the Earth were uniform, the value of gravity on the International Reference Ellipsoid would vary with latitude according to the normal gravity formula. This provides us with a reference value for gravity measurements. In practice, it is not possible to measure gravity on the ellipsoid: the elevation of a measurement station may be hundreds of meters above or below the ellipsoid. Moreover, the gravity station may be surrounded by mountains and valleys that perturb the measurement. For example, let P and Q represent gravity stations at different elevations in…

Localised surface plasmons (LSPs) Surface Plasmon  theory and is applications constitutes a large ongoing research field. Plasmon mediated surface photochemistry and the charge transfer has give us an excellent window into the underpinnings of the challenges scientific breakthrough in that sector. At first, we can say that surface plasmon are a collective oscillation of electrons that are commonly categorized into two classes: propagating surface plasmons (SPPs) and localized surface plasmons (LSPs). LSPs are non-propagating excitations of the conduction electrons of metallic nanostructures coupled to the electromagnetic field. As for LSPs, light interacts with particles that are much smaller than the incident wavelength. The curved surface of the particle exerts an…

Lecture 1 The Rock What is Rocks? A rock is a naturally occurring solid mixture of one or more minerals or organic matter Rocks are classified by how they are formed, their composition, and their texture Rocks change over time through the rock cycle Igneous rock begins as magma. Lecture 1 The Rock Magma can form: When the rocks are heated When pressure is released When rocks change their composition Magma freezes between 700 °C and 1,250 °C Magma is a mixture of many minerals Types of Igneous Rocks Felsic: light-colored rocks that are rich in elements such as aluminum, potassium, silicon, and sodium Mafic: dark-colored rocks that are rich in calcium,…

Heavy Minerals and Iron Deposits in Bangladesh Beach Sand Heavy Minerals (HM) is a placer deposit (accumulation of minerals during sedimentation) of heavy minerals eg. zircon, ilmenite, or rutile on a contemporary or ancient beach or along a coastline (Fig. 1).Specific gravity: >2.9 Investigation started: in 1961 by the Geological Survey of Pakistan around the Cox’s Bazar sea beach area and a number of precious heavy minerals were identified. Location: Seventeen placer deposits are found where fifteen are in the Cox’s Bazar-Chittagong sea beaches and nearby offshore islands. Seven are from the Cox’s Bazar-Teknaf sea beaches, seven from Maheshkhali Island, one each from Matarbari, Kutubdia, and Nijhum islands, and Kuakata.…

Earths heat will increase 50 times it is impossible to survive Scientists have repeatedly said that global warming is one of the most feared causes. They have also said global warming will increase nearly 50 million times over the next century. They have researched that all the normal laws of the world will change completely and as a result, the weather will change. It may be almost impossible for people to survive if the temperature rises so much. Scientists have warned that if the amount of greenhouse gases on Earth does not decrease at the right time, no one will be able to stop this rate of global warming. They…

Hardrock Hardrock is commonly known as the basement or crystalline basement or consolidated rock. It is usually formed underground during Precambrian Era. Basically, Hardrock geology is the study of igneous and metamorphic rock.Age: More than 600 (or 570) million years.Example: Igneous rock: Granite, Basalt, Diorite, Gabbro, and Kimberlite; Metamorphic rock: Gneiss, Quartzite, and Marble. Basement/Crystalline basement rock Basement rock is the thick foundation of the oldest metamorphic and igneous rock that shapes the continental crust. Again crystalline basement rock is composed of minerals in a crystalline state. Engineering or construction stones Hardrock or dense igneous and metamorphic rock is generally known as engineering stone or construction stone. While construction stones…