Fossil Hill Zone Trench Results Return up to 9,590 ppm Cu in Bedrock and Soil Sampling Results Show Strong Geochemical Anomalies Along the Boudreau Brook-Fossil Hill Trend at Magna Terra's Rocky Brook Project, New Brunswick Ready to Announce with

Toronto, Ontario--(Newsfile Corp. - March 25, 2026) - Magna Terra Minerals Inc. (TSXV: MTT) (the "Company" or "Magna Terra") is pleased to announce geochemical results of a soil sampling and trenching program at the Boudreau Brook-Fossil Hill Trend on its Rocky Brook Project ("Rocky Brook" or the "Project"), located in the prolific Bathurst Mining Camp ("BMC") of northern New Brunswick (Figure 1).

The soil sampling results show anomalous copper, zinc, gold, and silver values that are coincident with EM anomalies along the 15-kilometre-long Boudreau Brook-Fossil Hill Trend, one of five high priority targets identified by analysis of regional airborne geophysical and geochemical data sets (see news release dated October 27, 2025) that is located 5.5 kilometres to the north-northwest of Canadian Copper Inc.'s Caribou Mill Complex (Figure 2). Grab* and channel sample results from a trenching program at the Fossil Hill Zone confirmed the presence of native copper and copper sulphides (see news release dated December 11, 2025) and returned copper values up to 9,590 ppm, 9,210 ppm, and 9,080 ppm Cu.

"The results of our initial trenching program on the Rocky Brook Project are very encouraging. The impressive samples of visible copper mineralization in the trenches confirms the results of historic rock grab sampling on the Project. This abbreviated trenching program testing the Fossil Hill Zone only exposes a small section of the larger Boudreau Brook-Fossil Hill Trend where previous work has outlined a 15-kilometre-long zone of coincident copper mineralized rock samples and anomalous soil samples consistent with zones of conductivity and elevated gravity. The proximity of this zone to Canadian Copper's Caribou Mill Complex adds a compelling narrative for the potential to identify and delineate additional copper-rich massive sulphide deposits well within economic trucking distance to the Caribou Mill Complex. In parallel with the trenching work at Fossil Hill, we continue to explore along the larger 15-kilometre Boudreau Brook-Fossil Hill Trend, and we are very encouraged by the results of soil sampling indicating polymetallic (Cu-Zn-Au-Ag) signatures that coincide with airborne conductors and elevated gravity signatures. In 2026, we will look to further advance this trend and other identified high priority targets throughout the Rocky Brook Project, including targets on our Restigouche Property located between 5 and 10 kilometres to the southwest of Canadian Copper's Murray Brook Deposit."

~ Lew Lawrick, President and CEO, Magna Terra Minerals Inc.

Rocky Brook Project Highlights

VMS Highlights

Gold Highlights

Soil Sampling Program

A total of 2,515 soil samples, including 86 duplicates, were collected over three grids designed to cover key areas of the Boudreau Brook-Fossil Hill Trend including the Boudreau Brook and Fossil Hill mineral occurrences. The grids covered 7.2 kilometres of the 15-kilometre trend with each grid at 200 metre line-spacing and 25 metre sample-spacing (Figure 3). The results highlight key areas with multi-element anomalies (Cu, Zn, Ag, and Au) that are spatially coincident with EM conductors and prospective stratigraphy (ie. mafic volcanic and sedimentary units of the Sormany Group). The Company plans to complete gaps in the survey as part of its comprehensive exploration plans commencing in the spring.

Of the 2,515 samples collected over the Boudreau Brook-Fossil Hill Trend,

Trenching Program

A total of three trenches (T4, T7, and T8) were excavated, totaling 245 metres in length and exposing 192 metres of bedrock, at the Fossil Hill Zone targeting areas of historical grab samples* including 16.65% and 13.84% copper and 0.64% cobalt (Figure 4). The trenches exposed massive mafic volcanic and mafic volcanic breccia rocks, locally siliceous, of the Armstrong Formation, Sormany Group. A total of 93 samples were taken including 68 grab samples* of bedrock taken at 1 to 3 metre intervals, 11 grab samples of float, and 14 channel samples ranging from 0.1 to 1.0 metres in length (Figure 4). Copper assay results range between 5 to 9,590 ppm, with three outcrop samples above 9,000 ppm Cu. Table 1 summarizes select significant sample results above 100 ppm Cu. Stripped sections of these trenches remain exposed for further mapping and sampling in the spring.

Trench T4 was 73.5 metres long and between 2 and 4.5 metres wide. A total of 26 grab samples of bedrock were collected of massive mafic volcanics and mafic volcanic breccias. Five of the grab samples contained malachite infilling fractures hosted in both the massive mafic volcanics and volcanic breccias (Figure 8A). Copper assay results range between 5 to 9,590 ppm with mineralization >100 ppm Cu over a length of 3.7 metres (true thickness unknown) (Figure 5).

Trench T7 was 81 metres long and between 2 and 3.5 metres wide. A total of 23 rock samples (1 outcrop, 14 channel, 8 float) were collected of massive mafic volcanics and mafic volcanic breccias. Two channel and one float sample(s) of massive mafic volcanics hosted malachite along fractures. Copper assay results range between 2 to 1,600 ppm (Figure 6).

Trench T8 was 90.5 metres long and between 4.5 and 7 metres wide. A total of 44 rock samples (41 outcrop, 3 float) were collected of massive mafic volcanics and mafic volcanic breccia. The eastern half of the trench consisted of 49 metres of intense silicification of the mafic units. Copper mineralization consisting of calcite+/-quartz vein-hosted chalcopyrite+malachite+/-azurite in five grab samples of bedrock (Figure 8B), one locality of vein-hosted native copper (1 outcrop, 1 float) (Figure 8C), and fractures coated by malachite was observed in 11 samples (9 outcrop, 2 float). Copper assay results range from 3 to 9,210 ppm with mineralization >100 ppm Cu over 25 metres (true thickness unknown) (Figure 7).

Table 1: List of rock grab, float and channel samples with copper assay results greater than 100 ppm from trenches T4, T7, and T8 at the Fossil Hill Zone.

Magna Terra would like to acknowledge and thank the Province of New Brunswick for partial financial assistance granted for work on the Rocky Brook Project under the New Brunswick Junior Mining Assistance Program ("NBJMAP").

The Rocky Brook Project

The Rocky Brook Project comprises 31,489 hectares in 75 mineral claims making the Company one of the single largest strategic landholders in this historic mining camp (Figure 1). The Rocky Brook Project is located adjacent to and along strike from the Williams Brook Project, owned by Kinross Gold Corporation ("Kinross") and Puma, where a zone of high-grade gold mineralization was discovered over broad widths including drill intervals up to 5.55 g/t Au over 50.15 m (refer to Puma's news release dated September 15, 2021). The Project is located adjacent to a 30-kilometre-long section of the Rocky Brook-Millstream Fault and associated McIntyre and Ramsay Brook faults; an important structural zone controlling gold mineralization within the region. The Project also covers volcanic and sedimentary rocks that show strong potential to host polymetallic Cu-Co-Pb-Zn-Au-Ag mineralization, adjacent to the past-producing Caribou Mine and the Murray Brook Deposit, which is the largest undeveloped VMS project in New Brunswick owned by Canadian Copper Inc. (Figure 1).

The Bathurst Camp

The BMC is one of the world's oldest base metal (lead, zinc, copper, gold and silver) mining districts hosting one of Canada's largest VMS deposits, with the past-producing Brunswick No. 12 Mine having operated for 49 years. The BMC is host to over 46 mineral deposits, several of which have been mined, including the Brunswick No. 6, Heath Steele, Wedge, Stratmat, Half Mile Lake, Caribou and Murray Brook. A total of 136,643,367 tonnes of ore grading 3.44% Pb, 8.74% Zn, 0.37% Cu, and 102.2 g/t Ag were mined from the BMC (McCutcheon and Walker, 2020**).

Figure 1: A map showing the location of the Rocky Brook Project, adjacent exploration projects, fault zones, and mineral occurrences.